Back to the matter of turning off a car’s engine and ensuring that brakes and steering still work:
I’d sure add this to any test drive of any vehicle! Get to an empty lot, get ‘er up to some sort of speed, turn off the key and try the brakes and steering. Again, these systems should still work, even if you have power steering and power brakes, but would require more muscle than if the engine is on. Good practice for Toyota owners!
Mechanics take note: add this procedure to a buyer’s check!