Yep, get a set of metric wrenches and a 3/8-inch socket set, a few various lengths of 3/8-inch extensions for the socket set, and a metric hex key set. Get 19mm, 22mm, and 24mm wrenches and sockets if they're not included in the sets. This assumes that you have the basic hand tools: Screwdrivers, rubber mallet, various pliers, etc.
That's what you need to start. The screwdriver handle with a set of torx bits and a set of metric Allen (hex) bits is a bonus and well worth having, not expensive either if you look in the bargain tool bin at Ace Hardware. But don't buy too cheap for the ratchet set. Craftsman (Sears) or Kobalt (Lowes) is decent quality and reasonably priced. Craftsman frequently goes on sale, keep an eye on the Sears web site
You'll need an 18mm Craftsman or equivalent thin spark plug socket too.
Buy the other tools as you need them, and in a year or two you'll have most of what you need. Think eventually about a torque wrench and a set of 3/8" metric Allen bits for it.