Keeping one's money in a bank for safekeeping

Q:

1. Is opening a 'Shariah-compliant' savings account at a bank or at an 'Islamic' Bank with the sole intention of the bank safekeeping your money permissible if one intends to give all 'profit' earned in charity?

2. If one already has an investment account at an 'Islamic' Bank that claims to follow a Profit-and-Loss mode of financing, what should one do? Should we close down the account?

3. Is it against taqwa to save/invest money for the future?

4. What are the permissible means if one wishes to save/invest?

Marrying one's first wife's niece

Q: I know a person who is married to 2 wives. The relation between the two wives is aunt and niece i.e. the second wife is the first wife's niece (that means his first wife's brothers daughter). The second wife had physical intimacy with the man before his second marriage. Does hurmat musaharah takes place in this case? Is the second marriage valid or not?

Inheritance

Q: My father in law, Mr. A has 6 daughters (all married). His late father had many properties which have not yet been distributed among his heirs due to some legal problems. Now Mr. A is not well. He has 4 questions:

1. Will Mr. A get his complete share as per shariah when the property is distributed?

2. If he passes away before the distribution, will his daughters get his complete share?

3. After his death, how will his property be shared among his heirs?

4. Can he make a will giving everything to his daughters now?