Financial guidance in Surah e Baqarah

Usuary

Those who eat Ribâ (usury) will not stand (on the Day of Resurrection) except like the standing of a person beaten by Shaitân (Satan) leading him to insanity. That is because they say: "Trading is only like Ribâ (usury)," whereas Allâh has permitted trading and forbidden Ribâ (usury). So whosoever receives an admonition from his Lord and stops eating Ribâ (usury) shall not be punished for the past; his case is for Allâh (to judge); but whoever returns [to Ribâ (usury)], such are the dwellers of the Fire - they will abide therein
Allâh will destroy Ribâ (usury) and will give increase for Sadaqât (deeds of charity, alms, etc.) And Allâh likes not the disbelievers, sinners.

O you who believe! Be afraid of Allâh and give up what remains (due to you) from Ribâ (usury) (from now onward), if you are (really) believers.And if you do not do it, then take a notice of war from Allâh and His Messenger but if you repent, you shall have your capital sums. Deal not unjustly (by asking more than your capital sums), and you shall not be dealt with unjustly (by receiving less than your capital sums). And if the debtor is in a hard time (has no money), then grant him time till it is easy for him to repay, but if you remit it by way of charity, that is better for you if you did but know.And be afraid of the Day when you shall be brought back to Allâh. Then every person shall be paid what he earned, and they shall not be dealt with unjustly.

Vese no. 276-281 Chapter Al Baqarah

Encouragement to spend in the cause of Allah with open heart and without pomp and show

Those who spend their wealth in the Cause of Allâh, and do not follow up their gifts with reminders of their generosity or with injury, their reward is with their Lord. On them shall be no fear, nor shall they grieve.Kind words and forgiving of faults are better than Sadaqah (charity) followed by injury. And Allâh is Rich (Free of all Needs) and He is Most-Forbearing.
O you who believe! Do not render in vain your Sadaqah (charity) by reminders of your generosity or by injury, like him who spends his wealth to be seen of men, and he does not believe in Allâh, nor in the Last Day. His likeness is the likeness of a smooth rock on which is a little dust; on it falls heavy rain which leaves it bare. They are not able to do anything with what they have earned. And Allâh does not guide the disbelieving people.
Verse no. 262-264 Chapter Al Baqarah

O you who believe! Spend of the good things which you have (legally) earned, and of that which We have produced from the earth for you, and do not aim at that which is bad to spend from it, (though) you would not accept it save if you close your eyes and tolerate therein. And know that Allâh is Rich (Free of all wants), and Worthy of all praise.Shaitân (Satan) threatens you with poverty and orders you to commit Fahshâ (evil deeds, illegal sexual intercourse, sins); whereas Allâh promises you Forgiveness from Himself and Bounty, and Allâh is All-Sufficient for His creatures' needs, All-Knower.
He gives wisdom to whom He wills, and whoever is given wisdom is certainly given a lot of good. Only the people of understanding observe the advice. Whatever expenditure you spend and whatever vow you make, Allah knows all of it, and for the unjust, there are no helpers/supporters.

Verse no. 267-271 Chapter Al Baqarah

Those who spend their wealth (in Allâh's Cause) by night and day, in secret and in public, they shall have their reward with their Lord. On them shall be no fear, nor shall they grieve
Verse no. 274 Chapter Al Baqarah

Guidelines for Dealings

O you who believe! When you contract a debt for a fixed period, write it down. Let a scribe write it down in justice between you. Let not the scribe refuse to write as Allâh has taught him, so let him write. Let him (the debtor) who incurs the liability dictate, and he must fear Allâh, his Lord, and diminish not anything of what he owes. But if the debtor is of poor understanding, or weak, or is unable to dictate for himself, then let his guardian dictate in justice. And get two witnesses out of your own men. And if there are not two men (available), then a man and two women, such as you agree for witnesses, so that if one of them (two women) errs, the other can remind her. And the witnesses should not refuse when they are called (for evidence). You should not become weary to write it (your contract), whether it be small or big, for its fixed term, that is more just with Allâh; more solid as evidence, and more convenient to prevent doubts among yourselves, save when it is a present trade which you carry out on the spot among yourselves, then there is no sin on you if you do not write it down. But take witnesses whenever you make a commercial contract. Let nither scribe nor witness suffer any harm, but if you do (such harm), it would be wickedness in you. So be afraid of Allah; and Allah teaches you. And Allah is the All-Knower of everything.
And if you are on a journey and cannot find a scribe, then let there be a pledge taken (mortgaging); then if one of you entrust the other, let the one who is entrusted discharge his trust (faithfully), and let him be afraid of Allâh, his Lord. And conceal not the evidence for he, who hides it, surely his heart is sinful. And Allâh is All-Knower of what you do.
To Allâh belongs all that is in the heavens and all that is on the earth, and whether you disclose what is in your ownselves or conceal it, Allâh will call you to account for it. Then He forgives whom He wills and punishes whom He wills. Allah is powerful over everything.
Verse no. 282-284 Chapter Al Baqarah

To whom should the charity be made?

(Charity is) for Fuqarâ (the poor), who in Allâh's Cause are restricted (from travel), and cannot move about in the land (for trade or work). The one who knows them not, thinks that they are rich because of their modesty. You may know them by their mark, they do not beg of people at all. And whatever you spend in good, surely Allâh knows it well.
Verse no. 273 Chapter Al Baqarah

They ask you (O Muhammad SAW) what they should spend. Say: Whatever you spend of good must be for parents and kindred and orphans and Al¬Masâkin (the poor) and the wayfarers, and whatever you do of good deeds, truly, Allâh knows it well.
Verse no. 215 Chapter Al Baqarah