The thermostat may be stuck open, replace it. No ac belt won't effect the heater.
Could be a sensor
It could, it was an option.
it could havebeen built with it or with out
If all of them stopped working at once, it could be a fuse. Find the Fuse box and test the one that connects to your dash. if the fuse is bad, replace it.
could be a sticking thermostat.
Yes, it could.
Could be your speed sensor on your transmission
Verry easy with a awd intrepid , but its not bolt on , always thing to modify and adjust ;) but it could be done :)
you havn't taken it to the mechanic yet.
the solenoid on your starter is finished, replace the starter......
It could bend valves.
Check the label on the drivers door jamb. Could be a couple of different sizes.