This could get to be a long list, but to start with the basics,
Benches should be large enough (we use a 4x8' bench top), each bench should have a monitor, UPS, surge strip, unprotected power outlet (if you are going to work on Laser Printers) and a tool box. The tools that you will need are:
a set of screwdrivers, both phillips and flat, a power screwdrivers is also nice.
torx drivers from T5 through T20 (if you are going to work on laptops, other wise just T10,T15 and T20 will do).
A selection of sidecutters and pliers, a multimeter, small files, I use chem spatulas to open laptops with. Heat sink grease and extra cpu fans are a must.
As far as the other stuff that you need, I would suggest a Bench jig computer. Makean open frame that mounts a motherboard (make it interchangable for different cpu's), various styles of motherboards, both PCI and AGP video cards, sound card, modem, nic, extra cables, both a ATX and an AT ps, cd rom, cd burner, dvd, and any other parts that you might need to test out. Additionally, you should have a phone line available for testing modems, and a high speed or network cable available to test nic's.
(Continued on next post)