If you buy the Micarta or G10 in larger slabs you'll need a coping saw to cut the scales out although I use one of my band saws. A small bench vise and maybe a couple of medium c-clamps or a bar clamp to clamp the knife to a table to hold the knife while you're working on the handle. A half round double cut file, a half round smooth cut file (a rasp will be too coarse). A Harbor Freight 1x30 grinder isn't to expensive, a Craftsman 2x48 cost a little more plus grinding belts. A drill press like Blues Bender mentioned above plus drill bits, one of mine is a bench top model I found at a junk shop for $40. Different types of bolts used instead of pins will require matching step drills and other such specialty items. Large dowel rods and blocks of scrap wood will do for sanding blocks. Lots and lots of wet or dry sandpaper in all grits up to P2000.
When I started making knives, not so long ago, I had a lot of this stuff on hand in my wood shop, but if you're just starting out it's surprising how much stuff it takes to get started. You may have a friend or neighbor who would be nice enough to let you use his drill press, band saw or work bench. A local knife maker who could show you the ropes and teach the basics would be really great.
