You'll basically just need the basic building supplies....

-Straight building board
-Pins
-Hobby knife
-Razor saw or something similar
-Assorted sandpaper with sanding blocks
-Thin and medium CA glue
-Regular wood glue (not 100% necessary but it's cheap and come sin handy)
-Straight edge
-Some sort of square or triangle
-At least 2 rolls of covering
-Wheels
-Fuel tank
-Spinner
-Engine
-Fuel tubing
-Covering iron
-Heat gun (optional but nice to have in my opinion)
-Pin vise with small drill bits

There's probably something that I'm leaving out. Sig does a good job of listing needed tools and supplies on the box and in the manual.

When I first started building, I really had nothing more than an x-acto kinfe, some sandpaper wrapped around a 1x2, a ruler and an old clothing iron. It was tough but I got a kit done. I slowly added tools and supplies as time went on.