Frank, I have built three of them and have #4 on my bench right now. Did not have any intention of doing another but ran across a heck of a deal on a kit at a gun show and had to "rescue" it.
You don't need much in the line of tools. Screwdrivers, files, a wood rasp, some sandpaper, finishing supplys and elbow grease will get you there. You can build these plane jane or spiff them up a bit. Polishing the metal is the most labor intesive part of a gpr build. Forgot to mention browning solution for the metal. OTOH, you don't really need it if you choose to leave it in the white. My best looking wood has been the ones without stain. Just filled the grain and finished with Tru Oil.
You have to check the fit of the inlet parts right off when you get the kit. It's not uncommon to find some cattywampus inletting. If you run into that and there is no ready fix, Lyman is real good about replacing the parts.
Good luck with it.