1997 Saturn won't start

1997 saturn manual transmission will not start. My coolant sensor has been messing up lately.......could that be related? I had it at a body shop today, getting the driver's side door repaired, and when I went to pick it up, the car wouldn't start. Also, the trunk latch quit working. Is that coincidental or could they have pulled some kind of a wire?

I have to leave town in the morning. Please Help!