for my first rebuild, i took my bike to the lbs (where i knew its park tools were priced reasonably), and asked one of the guys there to help me select these basic tools i knew i needed:

-thin cone wrenches, where each end is a different size. i have three of these now (two 13/14mm and a 15/16mm).
- headset wrench, 32/36mm.
- bb spanner, where one end has one tooth, the other has multiple teeth.
- cable cutters.
- tube of grease.
- 3-headed spoke wrench.

he even took some out of the package before purchase to verify fit.

i went to a co-op in town and picked up a $10 chain tool, cheap pedal wrench, and $7 crank puller ('wrench force' brand).

the other things i use all the time are my metric socket set, adjustable wrench, allen wrench muti tool, and screwdriver with multiple bits. i have a few other park tools i don't use much.

i wish i had a vise and digital caliper.