Kufr

Q: There is a brother who is now reverted toIslam for 5 months. Few years ago when his mother died, he got from his mother a necklace with a Christian cross as heritage. And he promised his mother to that he also will give it away to his children as heritage. Now as he has reverted to Islam, what he has to do with the necklace? Currently he is keeping it in his house in a box. Can he keep this and give it later to his children. The necklace is a heritage piece which is over 200 years in the family.

Q: If a Muslim did kufr and shirk i.e. sins which put him out of the fold of Islam, then how can he come back into the fold of Islam? Also if he has done numerous other types of major sins, then what is the procedure so that Allah Ta'ala will accept his repentance? Please explain in detail.

Q: If my husband doesnt perform his salaah does that make him a kaafir? And is my marriage valid?

Q: If wife and husband have argue about marrying more than 1 wife, and the husband says are you going to deny that it is aloud to have more than 1 wife, and the wife says "yes, I deny that", does the wife fall in kufr by denying this? Also is the marriage contract between the husband and wife annulled? Who's responsibility is it to get the marriage contract renewed?

Q: My wife's brother got married in a church to a christian women and have given a christian name to his daughter.  Is he a murtad and what should our relationship with him be?

Q: Whenever I tell my husband to read his Salaah, he jokes around and tells me no he is not reading because he is a Christian naauzubillah. By him uttering such words, does it break my nikkah?

Q: If a person knows he does not have wudhu and pretends he is in ruku but is not reading salah does this constitute kufr?

Q: I go for driving lessons. In the car of the driving school, there is a picture of something from another religion and a sign on the key ring. Is it permissible for me to go to the driving school and use their keys?

Q: Is it kufr to say that this medicine cures like acne as example. Like is it kufr to put your trust in that medicine? Before I read a fatwa of someone asking that question but they said its not, I don't really remember. But now I am hearing that Allah cures him not the medicine, so I am confused. So whenever I say this medicine has a cure for this, I think is the cure from Allah or Allah put the cure in the medicine. But I know if Allah wills he wouldn't let him be cured by that medicine. Did I commit kufr?