Shift Override Cover. Should have been installed during the PDI (Pre-Delivery Inspection), it could have been lost during transport if you bought the vehicle used. Its an easy enough part to have the dealership replace.
^. When I first bought by 2007 SR5 (second hand) from a dealer, there was an issue where it wouldn't let me shift from park even though my foot was on the brake. It also made my brake lights not work.
I had to use that little button to shift out of park before the dealership fixed it. There should be a little cover for it. But you can just stick your finger down there and it will free your shifter.
This thread could have provided the lols.... Yall ruined it be telling him the correct answer.