Interest, in finance and economics, is payment from a borrower or deposit-taking financial institution to a lender or depositor of an amount above repayment of the principal sum (that is, the amount borrowed), at a particular rate. It is distinct from a fee which the borrower may pay the lender or some third party.
It is allowed to take what is known as Student Loan from Non Muslim authoraties even if you know that they will charge interest. You can pay it as you pay taxes to the authorities. It is not obligatory to take such loan but it is allowed.
Muslim is not allowed to work in usury (RIBA) dealing. If the job is away from usury then it will be allowed, but if it is related to usury in any way like taking, giving, accounting etc then it will be not allowed.
Working in any job in the bank which is connected with usury is not permissible. If the job is away from usury then it is permissible.
Learning programming is allowed in any company or school or college, but indulging with interest (RIBA or usury) is not allowed for Muslims.
There is no point in leaving it in the account because it will utilised by the non Muslim bank with no benefit to you or to any poor person. Utlizing interest from non Muslim is allowed according to verdicts of leading scholars ( Maraaje' of Taqleed). You can utilize the money or give it to the poor and you don't need to tell them that it is from bank interest money.
It is not allowed to take loan with interest from Muslim or any bank or financial institution owned by Muslims.
It is allowed to take from non Muslim any amount in a lawful way to be used in a lawful way even if you know that non Muslim will charge you interest which you pay it as you pay taxes or service charges to the non Muslim as part of their financial practice.
Sincere servants of Allah who are really after the truth, are always attracted to the truth by many ways. Allah (SWT) says in Quran : Those who strive for Our sake, We will guide them to Our way.(Sura 29, verse 69).
It is a big bounty from Allah on you to be attracted to know more about Shia Islam because it is the original Islam of the Prophet and Ahlul Bayt (AS). Keep on thanking Allah for His bounties.
Knowing more about real Islam will make you more near to the truth. You will be then helping yourself to gain the Paradise and be with the Prophet (SAWA) and his Progeny Ahlul Bayt (AS).
Owning and using Credit Card is allowed as far as you utilize the money of non Muslim banks or financiers in lawful way.
Yes you can buy shares of such company as far as their business activities are lawful according to Islam and you don't know that they take interest from Muslims in usury.
No. There is a big difference between these two situations. Receiving interest from non Muslims as part of their practice, does not mean that you can invest your money in the bank as a share holder. Muslim is not allowed to buy shares of any company indulged in unlawful (Haraam) business.
As far as you are renting his property, you must pay the rent to him, no matter what is his business.
If the company is dealing with Halal products only and the finances were taken from non Muslim banks or financial institutions, then it is allowed to invest in its stocks.