Ignition key can't be turned in 1993 Taurus

This car has no brakes and has been sitting in park for five months, on a steep hill, facing down with wheels pointing toward the curb (left).

Last week when I tried to turn the ignition, I realized it wouldn't budge. I tried (perhaps unsuccessfully) turning the steering wheel while I manipulated the ignition key. Relatedly [or not] is the fact that the car won't come out of park, unless a little wiring box (located near the brake pedal, under the steering column) is pinched.

It can't even be towed just now, with it being stuck in park.

CRIKEE. Thoughts are appreciated.