[ubuntu] Installing Graphics Drivers Help

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http://ubuntuforums.org – I just decided today on giving Ubuntu a try and so far I love the look of it. I am completely new to all of this and so far have only installed Ubuntu Restricted Extras. When I look at the Details of my pc, I notice that it doesn't display my Graphics Card, it only says 'unkown'. I tried Googling how to install ATI drivers for Ubuntu 12.10, but I don't really understand most of the posts I read. My laptop has an ATI Radeon HD4200. Another question I have is how do I manage to play World of Warcraft? I heard of Wine and was wondering if I just need to install that to run it? And lastly, if an (Hardware)