with the given details what could be the probable cause of my vichicle malfuction?

I have an 05 Chevy Trailblazer and I have few issues with it.
1. The gear shifter won't come out of park without using the release button.
2. They key won't come out of the ignition without the release button.
3. My blinkers and hazards aren't working.
4. My dash lights went out also along with my a/c.