Anyone have any advice for me? My temperature gauge just all of a sudden went to -35, meaning it thinks the temperature outside is a negative 35 degrees! LOL what is with that, anyone know how to fix it?

Also, my radio display is so dim, I can't even read the stations anymore. Is this a common problem??

Temp display iis usually realted to the sensor. Sensor should be in the front air dam, drivers side (looks like a platypus beak). I have had to remake the connector once (used bullet style male.female crimp on connector avialable at any parts store) as well as clean and resplice the wiring (maybe a broken wire). So jack her up and slip under, this is usually a simple repair. The radio display could well be a dead bulb.