Tools? This is not going to be pretty or quick.

You have steel and plastic in various sizes and configuration. You have a heavy frame on which to pound, bend, and abrade materials into shapes of your fancy.

Screwdrivers: standard configurations could be made from the window-moving rods found when you pry open door panels. With more abrasion, Phillips, Torx and hex screwdrivers as at least theoretically possible. Keep your eye out for small metal parts whose thickness allows them to be used as-is for screwdrivers.

Wrenches: thinner metal bent around to pinch a nut or bolt-head can work for smaller, less stubborn parts. Oil dripped from the dip stick and left to soak might act as penetrating oil to add lubrication on more stubborn fasteners. Adding small metallic pieces to the inside the lug-nut socket should allow it to get a grip on fasteners of smaller than lug-nut size. Note that the hollow-tube jack-handle pieces are usually designed to be added to the tire-iron to increase its leverage, use them for more stubborn fasteners. Keep your eye out for straight-sided, slotted metal parts that might serve as wrenches.

Hammers: sturdy, heavy things that can be used to pound should be found as you dismantle the vehicle. The tire-iron can be used for some of this but is probably too valuable except for initial use to get to other hammer-usable stuff.

Prybars: Much like hammers, just look for suitable scavenge and the tire-iron can be used initially.

Saws: Plastic, and with more time, metal teeth can be abraded out of straight plate material.

Cutters: Sharpened metal plates bolted together to "close" closely together should be possible. Pruning-style hooks with sharpened inside edges can be abraided into being.

Knives: staight metal with an edge abraded on one side.

And I am sure the collective has those in it who can think of many more.