I live in ma and have no title for my car, i can't find the last owner.?

Other answer:

Christine:
Then it's not your car. A car does not become your car until you get the title. If you get a car without the title, then it continues to be owned by the person whose name was on the last title. And you can be arrested for stealing the car.
realtor.sailor:
Without a title you can't get insurance. Don't drive it!
Scott:
Then you can't title it in your name. You have an expensive driveway ornament.
STEPHEN:
If you have no title you can't say "my car".