You can download the manuals for many of Great Planes' kits from http://www.greatplanes.com/parts/index.html#kits
If you download the manual for one of the trainers (PT-20, PT-40, or PT-60) there is a huge list of recommended tools and supplies. You do not need everything they list but it's a place to start.

The SIG Somethin Extra is a fairly "sleek" looking kit that is reportedly pretty easy to build. It is not a good "first plane" for flying.

If you do not already know how to fly, you could get an ARF trainer and learn on it while building your kit.