The driver's seat of the F1 is custom fit for the owner at the time of purchase. It is a fixed back seat, but there is a fore and aft adjustment that can be made much like any other car seat to accomodate other drivers. Other portions of the initial fitment process can involve adjustments of the pedal box and the steering wheel if I recall correctly.
The car has a key just ahead of the shifter on the right tunnel. It is located in the chassis plaque. This key controls the electrical system, and the key also features a shift lock integrated into it as part of the theft deterrent system. Once the car runs through its initial disagnostic check, the engine is started via a red button housed under a spring loaded flap just ahead and to the right of the shifter. Here's a photo which shows everything I just mentioned:
>8^)
ER