Ok guys I need some help, I work for a printing co. and we just bought a sign shop that closed. It has a K2 CNC router table and is running with Mach3 software.
I have been given the task of learning to run this thing. I can turn it on and move the router across the X & Y access but that's it. I not even know what key in the keyboard move the Z access. I need help!!!!!! Does anyone know where I can get INFO basic info. All I'm finding is stuff for those who already know how to do the basics. Any help would be great.

Check out the video tutorials.  They should get you started.

http://www.machsupport.com/videos/

There's also written documentation.

http://www.machsupport.com/documentation.php