He doesn't have gmail
No Email ID is a verification for Gmail. It is used to verify if a user is a part of Gmail or not. The password and the ID form a unique combination.
You can send mail from gmail to other email id the same way as you do it for gmail IDs.
Once your Gmail id is created, it cannot be changed. You have to create a new account for that. Your Gmail ID is unique at the time of creation.
You cannot create a Facebook ID on Gmail. Facebook ID can be created on Facebook via Gmail. The confirmation mail is also received on Gmail.
The moment you open your ID, it is confirmed. The ID is confirmed when the person fills correct details. Gmail verifies it and confirms your ID.
There is no issue if you do not have any existing ID. You can still make a Gmail account. All you need to do if fill your personal details right.
You can create a Facebook account via Gmail. This links Gmail to connect with Facebook. The mails that you receive from Facebook are on this mail.
Go to GMail and Click on "Sign UP".
You have to subscribe to the newsletter. You can go on their website and register your Gmail ID. After that you will start receiving updates.
You can obtain a Gmail address from a Google Plus ID, by following the accompanying link.
No