The only tool normally needed to assemble a system from scratch is...a screwdriver with a Philips head. It's nice if the head is magnetized, but not necessary (makes it easier to pick up, install screws).
The motherboard manual (which will accompany any barebones or motherboard purchased individually) will cover BIOS screens, connections/items on the MB, etc. Too bad more users don't bother to read such before playing with systems, IMO. This will reveal all pertinent features of the MB (CPUs supported, RAM that works/is recommended, RAID support, etc.).
If users should misplace manuals, they are usually available online...along with drivers (if users misplace drivers CD).
No need for any of those tool sets for a home user, those are useful to those who repair/assemble for a living.
In today's world, you don't even have to buy a copy/version of Windows...Windows 7, RC1 is available for download/install to anyone smart enough not to buy a version of Vista today/tomorrow. Vista is done, over...except for those that love it for whatever reason and have no intent of going to Windows 7 when it's put out for public consumption (approximately 4 months is what I hear).
Master/Slave settings will pretty soon go the way of parallel ports...even though many of us still have useable PATA drives. SATA drives are just faster and cheaper and readily available to all. Not to mention the fact that solid-state drives will eventually become more universal but I suspect that SATA still will be around for some time.http://en.wikipedia.org/wiki/Solid-state_drive
(I get wordy at times): With all the various forums (where persons donate time to try to help, not hurt) and all the documented procedures/explanations at the command of anyone who knows what Google is...there's nothing to fear about venturing into new territory. The key is to do the research...before cash changes hands.