Tools demend on whats being added. My first vehicle is always a wooden frame + Box for an adhock shopping cart. it only requires a makeshift/stone hammer, and nails and two by fours for components. Metal frames will usually need duct tape, or welding rig and goggles, or blowtorch.
Like most of the crafting recipies alot of them have multiple possible combinations, and are well labeled inside the vehicle construction menu.
Jackhammer breaks/digs rock tiles, walls vaults etc… Basically anything that seperates you from thins you want, including rocks for crafting in the ground itself. You can use them (with enough fuel) and go full Dwarf fortress mining mode if you want and dig your own labrinths or underground Colosseum. The game has no gravity mechanic for terain, only structures. so you don’t have to worry about cave ins.
This same lack of mechanic can also be played with in the sky with utilization of ground making artifacts that mimic an in game creature that changes terrain. Since the game doesn’t know the difference between Z levels in regard to terrain, its possible to make giant floating islands accessible only via rope ladder or the like.
