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

Other answer:

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.
Without a title you can't get insurance. Don't drive it!
Then you can't title it in your name. You have an expensive driveway ornament.
If you have no title you can't say "my car".