Well, cool. You got your Park TM-1 at least ordered? You got your freewheel tool or at least ordered? You've googled "bicycle wheel building"? Printed out the first two articles? You'll need some wheel bearing grease. Cone wrenches. I use mineral spirits for a cleaning solvent, works and not too stinky. An Allen wrench set. Set of metric ignition wrenches.

Might need: Crank puller. Pedal wrench or might get by with a Crescent wrench. Probably some Aero-Kroil (google).

Get after it! Yes, you'll spend some money on tools, but if you want to monkey around with bikes, it's an investment in lowered future costs. Besides, it's fun to work on bikes.