You will probably want to grab MPW from Apple, as well as any documentation for the Macintosh toolbox that you can find.

If you have a little money to burn, a product like CodeWarrior Gold 9 will include the compilers, debuggers, and some getting-started books all on CD. The IDE is also easier to use than MPW, albeit less powerful IMHO. I'm guessing that a second-hand copy is rather cheap these days.