Display Settings?...

[CheeZWiZ27 aol com]

OK, i'm sure i'm being completely retarded, but I've been stuck in Windows 
forever and I finally built myself a linux box so I can mess around with it 
until I can go to it full blown. My question is how the hell do I change the 
display settings, like monitor, color depth, resolution, refresh rate, etc...

Also, what is the correct way to shut down Red Hat 6.0? I've been going to 
reboot Gnome and shutting it off at the POST because I haven't been able to 
find anything that says something about shutting down, or quiting to a 
command promt or anything like that.

Thanks,
-Jason Fox