How can I get my own e-mail address on somebody else computer?

I want to set up my own e-mail account but I'm on somebody else computer, How do I do it?

How can I get my own e-mail address on somebody else computer?
I don't understand the question. Your email address is tied to an internet provider not a computer. You can create a yahoo email account on any computer and access that same account on any computer. You can sign into your AOL account on someone else's computer by selecting GUEST on the sign on screen.