Get the book, you need one.
The bottom starter bolt is easy to get out, the top one, not so much. They might have a version of that wrench at an auto parts store. It's really bloody hard to make any other combo work well, ESPECIALLY if you don't have a lift.
Wiring: Make sure your wires don't touch each other when you reconnect them to the rebuilt starter. Oh... And disconnect your battery first. That big wire on the starter is connected directly to the battery and big sparks would fly if you tried to disconnect the wire with juice flowing through it.