What should i do if my 2000 Mazda 626 is stuck in park The gear can shift do Drive Reverse Neutral etc but the car won't move?

I'm just an ASE certified brake tech but i know a little bit about engines and transmissions and honestly it sounds like your transmission is gone, cause this recently happened to my Toyota mr2, but since I'm a guy of optimism check to make sure your parking brake is not on and that your brakes are not seized on your rotor