It depends.
Poor!
he's poor.
You will need a lawyer for a legal, current and correct answer.
You cannot sell a car that you do not own.
No. Consider the case of roommates who each own their own car and do not drive the other person's car; there's no reason for them to be insured on the other person's policy just because they live in the same house.
Yes
If you own your car or house and are no longer making payments, should you still have insurance on them? Explain why or why not.
In a household each person can have there own car insurance. You could also have a family plan.
Not many material things, which can vary from person to person and family to family.
Yes
Answer 1: yes, my sister is borrowing my car and she her own insurance on it.Answer 2: You can always get insurance as an additional driver on another person's car insurance policy. Isn't that how children in the house are added to their parent's car insurance policy?
The answer is simple: you can go to the police to find out. They will probably send that person a notice -if they know the current address- and if he/she does not answer in time, they will either send a bill or sign the car over to you.