You can change your Gmail address after you change your IP. You however do not need to do that. It is because gmail is independent of IP address.
Gmail has it's own address as Gmaildotcom. It cannot be changed to any other address. It changes when one logs into his/her account.
The Gmail address cannot be changed later on. The address is a permanent one and cannot be changed. It is the unique ID that is provided to you.
Gmail does not have a clock feature built in, so you can't change the time. It does, however, date incoming messages. This is done by determining your location through your ip address to get you timezone, and then timestamping each message. hope that helps
Yes, your email address will change. Each Email address has a particular account. Thus duplication is not possible here.
You have to delete all others manually. They cannot be deleted automatically by Gmail. Then you need to create the new Gmail address.
You can use filter in Gmail: [http://support.google.com/mail/bin/answer.py?hl=en&answer=6579]
Get a gmail account. They are really good at that. If you already have a gmail account, then I'm sorry, I don't know how to help you. In gmail, spam goes to spam, it does not get automatically deleted.
You cannot guess any Gmail address. The addresses of gmail belong to the owner. They are like the lock on the account.
Gmail is short term for google mail. It is email run by google. So technically it's email with less spam and junk.
GMail is an e-mail service provider and not a social networking site and so there is no way you can find someone on GMail. You can communicate with anyone in GMail only if you already have their e-mail address.
You can transfer your email address to your Gmail address book. Gmail can import various contacts from others. This can be done in the settings and then import.