Does iPad have virus protection when using E mails?

You can purchase an email attachment virus checker from the app store, but there is no means for an attachment you receive to infect your iPad. If you decide to by the app I refenced be sure to closely read the app description and some reviews.

You don't need antivirus if you have not jailbreak your iPad.

Jailbreaking

http://en.wikipedia.org/wiki/IOS_jailbreaking

If you don't know then you haven't done it and you don't need to worry about it. Or look it up on Google, has to do with hacking your iPad.