Kat,
One day i might get some Snapon tools, i prsonally believe they are the best.
Bit as most have said here the slightly cheaper brands are ok too.
3/8 and 1/4 inch drive socket sets are the go for working on bikes.
3/8 drive torque wrench are cheap enough now to have in the tool kit too.
Punch set, engineers hammer / ball penn hammer, nylon hammer,
cheapo multi meter from dick smiths, Electrical quality screw driver set.
Walk around the tool shop and look at stuff like,
tin snips, straight edge / steel ruler, vernier, tape measure,
electrical pliers and side cutters, centre punch,
soldering iron and resin core solder, sand paper, smooth file flat,
round smooth file / rat tail.
Go to a bearing seller type place and get loctite, anti-sieze the copper stuff,
RTV silicone.