Bothe button on shifter has always stuck but after warming up went in but it wont now.

Remove the center console viewing from the passenger side just under the shifter you will see the gear shift silenoid push in the button and now you can remove your key and shift into another gear

Take the transfer case apart and find out what is broke.

some cars have a little button near the shifter if yours has one hold it down while trying to change the gear amd try turning the key on as well

Check clutch fluid, must be low. If not this, then do clutch adjustment.

does the clutch push normally or is the linkage broken not disengaging clutch, and then does shifter move around or locked and wont move, loose linkage in shifter or gears are jammed inside transmission and something went, if shifter wont move at all then trans is jammed inside and needs repair.

Okay, you are correct, the key is stuck because of the shifter lock wont release, the most common reason is its stuck, you will need to remove the covering around shift to get to shifter lock release solenoid, there you will clean and lube it, you will need to move it by hand as you spray wd40 on the arms, you will see how it work by pressing the shift release and you will see to lever that gets pushed, it wont move because its stuck but you will see the levers move inside, hope this helps, good day.

you will have to press the over ride button to unlock the shifter

have the shift lock interlock solenoid checked out

Because of the computer set up - you will need to take it to the shop. If it is a rental or leased vehicle then the factory may have shut it down. Seen this happen.
Try this - take down the vin number and call the dealer - ask about recalls or any complications that concern the vin number you have.
This should get you pointed in the right direction.

I had the same problem and once I wiggled the shifter enough to get it out of park then the key stuck in the ignition started.