No, if it was it would be impossible to repossess a vehicle because no one would ever take them off.
Short answer is yes, in most jurisdictions the plates are registered to an owner and a car. If you purchase a new car the plates are still yours. There are exceptions, the UK for instance
They can attach anything you own anywhere.
not if you still owe money on it
Most likely not depending on what financial situation you're in.
Illinois plate were only prison made from 1933-1935. Illinois is one of the few states that have legislated against prison-made license plates They were made in the prison industry program despite the Depression-era cost of 6.4 cents per set. (That was "a lot" back then.) The prisons made the plates from 1933 to 1936, and these plates were re-issued without cost to vehicle owners as they were replacements. But the poor quality of the paint caused the Illinois Secretary of State to end the contract with the prison industry program and accepted bids from private contractors, who still make the plates today.
Yes you are
yes. When a vehicle is repossessed by the bank it doesn't mean that you stop making payments. You are still liable for the loan.
Yes, they are still illegal.
If it is repossessed, you will owe the difference between the loan amount and what they sell the vehicle for.
Yes, it's illegal. She's still a minor until she turns 18. It's worth the wait.
Even if they have parental approval, it is still not okay. It is still gross.