You can pretty much reload all rounds with any tools (presses, scalses, case trimmers, etc.) you buy, except for dies. You must have a specific set of dies ineach caliber you decide to load for. For .30/30, .30/'06, and .357 you need one set for each-three die sets.

A good source for low prices on reloading equipment is e-Bay. you can often buy new or near-new tools for about half-price.