You can get a "Building and Repairing PCs For Dummies" book, I got one for my friend so I wouldn't have to be woken up at 2am in the morning with a phone call because his PC won't turn on and he forgot to check it was turned on at the socket.
I built my first PC without reading any books other than the motherboard manual, most of the cables only go on one way, it was the power,hdd led, switch and USB expansion connections that I needed to realy have the manual by me as that was the most complicated part.
You could get more bang for your buck if you go for AMD, unless there is a specific reason you want intel. I wouldn't bother with a seperate DVDRoM combi drive as the DVD-RW will write CDs too.
As to the price shop around the indipendant PC shops near you to get the best deal, sometimes you can get a discount if you buy alot at once, and some do bundles (case, motherboard, processor and heatsink) for less than if you buy them seperately.