I believe the command is "wizhelp"
The command are kind straight forward from there, but I haven't used them in a while...if I recall the command is something like "makeimm" to create an immortal and sset to set skills. I'm sure someone will be along in no time to give you a proper list.
However, you should check out the read me files. Most of this stuff is covered in them. They're there for a reason and blah blah blah. Welcome to the forums though and good luck with you game!