I am not able to add a field to the phone number. I want it to be set up so when you input the numbers it will look like 000-000-0000 or a similar format.
Have you looked at the "Phone Number" field in the "Custom" section of the "Library" window?
It is for UK phone numbers, but one should be able to modify the "Dispaly Pattern", "Limit Length", "Validation Pattern" and "Validation Pattern Error Message".