Tools:
Vise
Bobbin

To tie the most with the least:
5 colors of chenille
Jig hooks
5 colors of marabou
Squirrel tail
Zonker strips
some sort of flash material
Paint for the jig heads
5 spools of 210 denier thread, only need black
head cement or hard as nails ( I don't like nor use HAN but others swear by it on other fourms)
Sharp pair of needle point scissors

There may be more that you want to get:
Hackle
hackle pliers
whip finisher
any fur and feathers you can get your hands on

And my personal favorite, peacock sword and herl. So versatile and works well. Eyes also add color and variety to flies and have numerous uses for adding color, shape and other parts to jigs.

There may be more and I am sure others will add to or subtract from the list. I can tie 50+ patterns with what I listed and they would all be different. Add the hackle and some feathers and you have more patterns that you could tie than I care to think about.