2nd pic is the top cam belt cover. If there's not one fitted to the engine now, it needs to go on, to protect the belt from debris, and you from injury.
The first pic looks like it might be the bottom cover for the cambelt, but that's just a guess.
Third pic looks softer material, and could be seat trim, where the seat pivots for the reclining mechanism, or to tilt access the rear of the cabin.