I can browse IE but i cant access any of the sites.

so, i bought an optiplex gx620 usff; dirt cheap.
i get everything it needs to run.
it had a windows xp sp3 disk in the drive so i load that, "it'll save me money." i thought.
after a few hiccups i get it started.
i try to look up something in IE but it said it "could'nt reach the site" or whatever.
i drag it to the router to plug in an ethernet cord (its short).

i soon find out that the: 1. ethernet driver is gone.
2. sm bus driver is gone.
3. audio driver is gone.
4. and some video drivers were gone as well.

so i spend hours trying to find drivers that would work for my computer.
i eventually get everything except the video drivers.
i try out IE again.
i type in "google.com" as an example and because i could'nt think of anything.
it shows me the link to google.
i click on it and it tells me it "can't reach the site" again.
so i come to here.
try just about all of the suggestions i can find.
i try again but i type "dogs."
IE shows me TONS of results for dogs; some including youtube videos.
i decide to click on a youtube video.
it takes me to the error page yet again.

if anyone can help me with this it would be greatly appreciated.
thank you.