trying to get a used mac set up for me

[matt mcdermott]

I was given a pretty up to date Mac (originally purchased in 9/06).

I've been using pc's for my entire adult life but I'm no computer expert expert. The switch to Mac OSX is giving me a couple problems. The problem I'm trying to tackle right now is Mail. I've been using the mail program provided by the internet company and everyone tells me I should be using the MaC Mail Program. I can't set up an account because Mail thinks I'm the previous owner and insists I have an account already.

I feel I should re-do the info in the computer so it is mine. How do I do that?

I'm running leopard.

Thanks for the help