Why are my dash lights heater lights tail lights and my heater in a 2000 Pontiac sunfire not working?

This sounds like an issue with a fuse. In newer sunfires, if the Radio/ACC fuse blows, no indoor lights work and nothing will turn itself off when the car is off (meaning your daytime lights will stay on even with no key in the ignition). It's a 20w minifuse, Walmart sells a pack for about $3.50.