Display problems

I do not know very much about computers. I am using a laptop. I recently formatted it, and it is running fine. Now though, everything is "flat" due to the fact that I can not get widescreen resolutions. At first I also had no sound because I did not have the audio drivers installed, so I found them on Dell's site (it is a Dell, xps m140). But I can not find anything helpful for fixing my display. Can someone tell me what I need to be looking for exactly?

Ok, I followed >>8
the advice given there, however I only see things there for ATI and Nvidia cards. I know that I do not have an ATI, and I just found out that I do not have an nvidia card, because it said so when I tried to install it.

I right-clicked on My Computer, selected properties, and went to hardware > device manager, and I do not even see anything on there about a video card. I might be mistaken, but I am pretty sure it should be there, along with every other component of this computer.

Am I mistaken? Whatever the case, how would I go about seeing what type of video card I have?