Interest bearing loans & Transactions

Taking an interest-bearing loan to study

Q: I have a great academic background and I want to continue my studies abroad. The country I am currently living in is Afghanistan, so my financial circumstances are not good and for continuing my studies I am not going to be able to pay for my education expenses. 

Can I get a loan and this loan has been accompanied by interest. Studying abroad is my dream and I can make my future through this. So can I get the loan?

Earning interest to pay off an interest bearing loan

Q: I have a brother and a sister. My brother has taken a loan from a bank and has to pay back the loan with interest. My sister wants to open a fixed deposit with the intention of giving the interest earned on the fixed deposit to my brother so he can pay off his own loan. Can she do it, even when my brother has enough income to pay off the loan himself?

Making taubah for taking an interest loan

Q: If a person, who in ignorance, took out an interest loan, thereafter realized his sin, made sincere taubah and made a promise to Allah never to take such loans again. However he still has the debt/loan to pay off and he doesn't have the full amount to settle it. Now going forward, does he still fall under the curse of Nabi (salallahu alayhi wa sallam), as he still has to pay off the loan and he will still be paying interest? Please advise whats the way to correct the situation.