Q: cannot complete email set up

Since you have not told us a thing about what you've done, where you're stuck, what exact model Mac, what version of OS X, who's your mail provider, etc. we can't help you. We're not clairvoyant.

OS- Setting up an email account

The warranty entitles you to complimentary phone support for the first 90 days of ownership.

Beg pardon? Where was there mention of your Internet connection? Did you read the link?

Oops, that was the wrong link. So sorry.

Apple - Support - Mail Setup Assistant