Truck is stuck in park,can't shift into drive even if depressing brake pedal wtf

What is your question?

My engine is running fine. 2005 Toyota PreRunner V6 automatic transmission and I Can not shift into drive even when the pedal is being pushed down Could it be a problem in the brakes, wiring, Could it be a bad sensor? WHAT AND WHERE is the mechanism or sensor that prevents a vehicle from shifting into drive? Why can't i shift out of park when i Push on the the brake pedal?

How long has your 2005 Toyota Tacoma had this problem?

today