I must have locked my keyboard, or half of my keyboard? The letters on the left hand side of the notepad will type correctly however; the right side is number locked? For ex: when I try to type uiop I get 456* (How do I disable this?) thanks

Find the number lock key and press it.

Do you have to shift and NumLk to toggle on and off?

As far as I know you just have to press the key itself.

Mine has NumLk next to F12, If I don't press shift, I get Screen Lock. I have heard other combinations on different Computers, including above.
What do you have?

I have a Mac, and I just have to press the key itself.