Is this Supposed to be Helpful, You should kept your remark to yourself.
Ignore these useless answers, I might have some suggestions, Check the battery voltage, and if the terminals tight/clean, make sure the car has gas, Check to see if you have spark. Past this point, things get complicated.
Probably not, although it could lead to other problems which would cause your car not to start.
engine
No. A bad starter would cause the car not to start.
No, a bad crankshaft sensor would cause the car not to start and run.
no, the thermostat would have nothing to do with the car not starting.
Possible, but not likely.
Yes
Out of time.
No spark?
Yes, one bad cell in a car battery will cause the car not to start.
Certainly, a loose wire on the car battery can cause the car not to start.
yes and ignition relay would..