Its like a firewall
It really depends on your router. But usually, you can open up Command prompt, type IpConfig, and then look for something that says Ipv4 address. Then go into your internet browser, type 192.168.0.1,...
Well, go back to where you got the email address and click on new user.
Go to Gmail.com Click 'Create Account'
Forgot what? If Password, click on "forgot password", then do the questions! If username, forget it! You need to make a new account! Hope this helps!