In the customer page, the name/ID would be the same as customer ID if I have "auto" on, does anyone know how to automatically populate the name/ID as name + customer ID instead of the customer ID only?

I believe you'll have to use scripting for that, you can only prefix auto-generated numbers with static characters

Do you know how to write the scripts? I would like to populate the name/ID like: last name, first name (Customer ID)