I just bought this Vehicle and yes i know i have a call into the car lot about it but sucks that each day a different alarm goes off has to be something simple please tell me i didn't just waste 13k for nothing.

This is really annoying. The door ajar light is on and it chimes until you get down the road a little bit. The driver side door lock isn't working either. I really would like to know how to fix this issue and a cost of repair. My dad retired from Ford and he doesn't even know what the problem is. If I can get an answer on the problem, my brother is a Ford mechanic and may possibly be able to help me.