This is the basic modeling tool kit that i'v purchase recently online: one (1) set basis tool set (plastic clipper, tweezers, file, screw driver & a cutter), panel lining marker (i prefer the Copic modeler pen, the tip is much finer than the Gundam panel lining pen), few varieties of Gundam color markers eraser, cutting mat, cement/glue, masking tape*, thinner*, spray paint*. I still yet to get my own airbrush set.
* used when using spray paint.
Some of it also can be bought at a local stationary store and local toy store, example CH-Toynation.