Ok,
1. Yes you may have title to the car, but you still owe the bank the money. Check your interest rate on that card.
2. I would not lend money to anyone including a finance. Wait till your married. If he has no money or bad credit you need to ask what happened.
3. You are liable for all premarital debts, and own the assets.
4. Taking out a loan while trying to get rid of debt is not a good strategy. Just pay down the debt.
Good Luck!