The cheapest video card you could get to display all high settings in WoW would be around the $120+ price range, Video cards are a pretty big upgrade and they cost a lot. If you plan on playing any other games in the future I'd recomend getting something a little better. When your looking to upgrade make sure you check what type of Video card your Motherboard Supports. If its AGP, get an AGP card NOT a PCI 16x. and vice versa.
I'm running the game with an ATI X800 Video Card and I can run everything on high with 6x anti-aliasing.
As far as RAM goes, it depends on how much you already have and how much virtual memory you have windows using. If you have 512mb right now, get another 512 to boost it to 1gb. If you have 1gb just get a new video card. MMORPGs tend to use alot of ram since its alot of loading and unloading data from the WoW Servers.
Edited by Mofficer, 10 May 2006 - 06:24 PM.