Making an ID on gmail just requires your internet connection. The connection should be established without breaking. You then just have to enter your details.
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.
go to gmail and that's it
No, Gmail account can only be created via google ID. You cannot make it by Hotmail ID. However you can send mails between these two.
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 make an ID on Gmail with some details only. The details are also the ones that are pretty common. First name, last name, gender etc need to be entered only.
He doesn't have gmail
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.
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.