2) Your Family isn't responsible for the debt you are so yes you must pay it as agreed. Unless they family member stole your identity
3) Dealers will tell you that voluntarily turning in your vehicle isn't considered a repossession on your credit, however, it is.
4) No, you will not see a change in 30days no one can promise that because each credit bureau has 30 days in which to respond to each request made.
5) Yes, you act as the buyer if they default.
1) If my debt says charged off, does it mean it's gone away.
2) This debt was created by a family member do I have to pay it?
3) I turned it in, is it still a repossession?
4) Will I have good credit in 30days?
5) Am I responsible if I'm just a co-buyer