Honestly, you could probably find a cheap online store for cables, but it might be more cost efficient to make your own. If you don't know how maybe someone at testmy.net could tell you how, or make some for you and give you a super deal  .

You'll need a punch down tool to attach the wire to the wall jacks and patch panel.  I'd suggest not using stranded, this is much harder to punch down than regular cable.  A good set of wire strippers. Also, a snake to run the wire down the wall cavities.  You can buy spools of wire pretty cheaply on-line and I've also seen it in Home Depot as well.  Patience is a good thing to have when getting wire into an existing building 

Edit:  I forgot, you may want to borrow or buy a line tester as well.  They are anywhere from 50 to 100 bucks. Got mine from home depot but here is another one from the net. http://www.action-electronics.com/tulan.htm#Tp500

I would suggest using cat-5e rather than cat-6, simply due to the price.  For your implementation, they both have the same standards:

CAT-5e: up to 1000Mbps over 350 meters.
CAT-6: up to 1000Mbps over 550 meters.

For the price difference, I would think you'd be best to run cat-5e.  As for tools and installation.....dunno.

As for a patch panel, do you just need a switch, or do you need a router?  Just keep in mind that your network is only as fast as your slowest piece of hardware.

You already got RJ-45 crimpers? Also if you are going to run it down a wall, I would buy a cheap $2 raceway. Make it look sharp ;)

How about from wall to computer or switch?

I mean the cat-5 cables that connectes the computers to the switches, are they pre-terminated?

I've never attempted punching down stranded, but a telecom guy I work with who installs cat5 daily told me it's difficult.  Stranded is primarily used for patch cords, not in the wall work.  Also, stranded is more expensive.   The kits that swimmer posted are more for creating long patch cords.  From what you siad earlier, it sounded like you wanted to have a patch panel in a room where you would take a patch cord, plug it into the patch panel, then connect the other end into a switch. Each RJ45 female on the patch panel would represent an outlet somewhere in your home.  Is this what you were looking to do or was I mistaken? 

Example of patch panel I've used:
http://www.cablemakers.com/patch-panels.htm

Edit:  Took my other edit out 'cause I'm an idiot and tired on occasion.......

http://www.tigerdirect.com/applications/SearchTools/search.asp?keywords=cat5e+solid&image122.x=0&image122.y=0