My car keeps needing to be jump started and once it's running won't shut off

What is your question?

Looking to buy a car off a friend of mine his son was in an accident not much damage done to it but the mechanic once I got the car has to be jump started and once it's running won't shut off

What makes this problem better or worse?

Unsure

How long has your 2002 Ford Escort had this problem?

Since he got the vehicle back from the mechanic