If someone else breaks into your account, it is hacking. You can click forget the password link and recover the password. You can then increase the security.
Yes because the account is no longer existing.
Facebook's passwords are not accessible via Gmail. Gmail does not store passwords anywhere. The most it does is receive notifications.
Well, I prefer that you use gmail, because it is very comfortable using it to email or chat with someone.
If you know their log in details.
You can log into your Gmail from any computer. You must log out from any gmail account opened. Then you have to put your details in it for the same.
You need to have the email ID of the recipient. You can write all the details about using Gmail. Then you can click send to send the mail.
Anything you want. Remember make sure its easy to remember but hard for someone else to guess.
Hacking any account is not legal according to Gmail. If you know the password, you can open it. Forcing someone else's account is a crime.
GMail is an e-mail service provider and not a social networking site. You cannot search for people using GMail. You can communicate with someone on GMail only if you already know their e-mail address.
Forged
You cannot unlock a phone using Gmail. Gmail is only connected if you login the lock application using it. It can help if you forgot your code.
You cannot access Facebook account using Gmail. You have to use it using the Facebook site only. Gmail is just for confirming the account.