Some of this makes sense, other things do not. "..Vehicles use more than one key?" It was possible, he'd hardly encountered a lot of cars or trucks in his time and this definitely was the first mechanical chocobo, so who knew how it actually worked.

At least if Jack's familiar with popping the hood of a car, the latch to remove this one is easy to find similarly, revealing the idling engine. It almost could pass for a motorcycle's engine and transmission, except in a very different frame.

The mouse nest tucked up in what might be a radiator at least has no mice still in it.