You get the removal keys at WalMart (and probably about everywhere else.) Mine are SCOSCHE "Ford and Import" Part number DT1.

If there are speakers behind the seats, then you have a Limited (just so you know) and therefore there IS an amp under the passenger's feet.

But if the head has no power, beware there are two fuses. One is in the box at the end of the dash, one is under the hood in the big box on the driver's side. The owner's manual will give you the fuse numbers. There is also a 10 amp fuse in the back of the radio, near the wiring connectors. You may have a hard time finding a new one of those, I think it's one of the oddball-sized "AGC" type fuses.