Q: I forgot my email and password for my iPad - Apple ID

If your friend set up the iPad with their Apple ID, you need to get them to remove it.

If they don't know how to do so, have them review the following article:

What to do before selling or giving away your iPhone, iPad, or iPod Touch - Apple Support

Then, unfortunately, the iPad will not be useable for you. You can try contacting Apple directly, but it's not likely they will be able to help you either.

General Apple ID Support: https://www.apple.com/support/appleid/