A good set of hex wrenches.
A large variety of small and standard Phillips and blade screwdrivers.
Pliers. Including needle noese and standard. Small and large.
Drill and bits. Especially useful for reaming suspension arms and stuff for smoother action.
Files and sandpaper. Smooth is always good.
Towels or shop cloths. You'll make a mess. Be prepared to clean it up.
Get a pit mat or pit pad to work on. That way screws and parts won't go rolling all over the place.
Get a good hobby knife. I use an X-acto A handle with #11 blades. Pretty good universal setup.
Wrenches that will fit your wheel nuts, clutch nuts and any other nuts.
Basically set it up like you're working on a full-scale car, but with smaller parts.