The cheapest way to serve some pages and cgi-bin calls is to get a slightly older PC computer (a 486 is probably fine), and add about 4 to 10GBytes of disk. This should give you lots of room for serving fancy graphic images. If you intend not to serve too much graphics, 4GB is probably fine. At present the operating system, Linux, takes about 1GB, so the rest is yours to fill with fatigue stuff. You also need a CD disk reader, and of course an internet connection card.
You could also use an old Sun SPARC 10 (or newer) computer workstation if you or other people are not using it.
Then simply answer the questions. The most unpleasant part is partitioning the disk, but the CD will figure out some defaults anyway, so even this should not be difficult if your happy with their suggestion. When you are done with the load, and do the reboot, the web server software, called "Apache" will be running. Total time to load and run is dependant on your CDROM speed and at 1X has taken me 3 hours (it was awhile ago). My guess is that you'll probably be done in about an hour with most newer CDroms.