AutoCAD help

Can someone explain how to change the scale? I've tried the scale button in AutoCAD but I can't seem to get it to work.

I did 2 drawings for a previous assignment and they were different scales. Instead of redrawing them, I want to just copy and paste one into the other.

Also, how do I change the name and not have it be AutoCAD drawings on them and print them separately? I tried print them and got blank pages.