This question generates a lot of debate. I would start with the kit from Avery or something similar. Then add at least the following tools...
Several die grinders with the small scotchbrite wheels on them
A Dremel Tool with the rotary file and the small abrasive cut-off wheels at least
A small bandsaw with a metal cutting blade or a fine tooth wood blade (18TPI or greater)
A drill press (a small benchtop model will do)
A shop-vac. You will be surprised how much you have to vacuum out that fuselage
Torquewrench (in-lbs)
At least 4 plumb bobs
A good 48" level and a good 24" level will come in handy
Emory Cloth, Fine, Med and Coarse
Tubing flaring tool
Tubing bending tools
A decent multimeter.
Wire stripers.
Wire cutters.
Wire Crimping tools (depends on what kind of terminations you are using).
Heat Gun
Lot's of Latex gloves
A respirator.
Safety glasses.
Noise arrestors.
Some dust masks.
I have a dry erase board that keeps me from forgetting important things.
I'm sure that I'll think of some more along the way. If you can think of any let me know.
Of course you will need a shop full of normal hand tools like wrenches, screwdrivers, knives, tape measure, etc.
Obviously you can borrow many of these from fellow builders if you need too. You will soon learn what tools you will need and how much you will need them and if you can borrow some good tools that you'll only need once in a while it can save you a bunch of money.