how do i setup email on windows 7, and is it possible i can use my old account that i used to use on outlook?
Hopefully you backed up your mail archives first. ( If you have an online account like Gmail that you just sync with Outlook, this is less of a problem.)
Anyhow, install Outlook, assuming you haven't done so already. Then you can do one of several things: Either use the Windows Easy Transfer Wizard to copy your mail archives and settings across to the new installation, or copy them yourself, create an account and manually point Outlook to your archived mail.
If any of this doesn't make sense, give us a shout.