How do I register my e-mail address so people with an IPone can call my IPad2 on facetime

-> Settings -> Facetime: check the E-Mail-Accounts You want to register for Facetime to ON.

Sign in with your Apple ID in Settings > FaceTime > Apple ID:

Settings>FaceTime

http://i1224.photobucket.com/albums/ee374/Diavonex/fa4f63c82892ffa3b8969207519bb 724_zps79bf0664.jpg

I have tried that but I get message saying that e-mail address has an invalid character (my e-mail has an '&" in it.

Any help?

also, when I add an e-mail address to my Mac it also adds to my iPad. In order to be able to use facetime between the two I understand I need to have separate e-mail addresses on each item. How do I stop a new e-mail automatically appearing on the other device under my account

You can't have & in your apple id, in fact I know of know other service that would allow to create an email address that way.

You use your apple id for facetime, you can have muliple email addresses associated with your apple id. One device can use one address, the other device can use another. Technically, both are using the same apple id, but are using different email addresses to sign in with.

Go to your apple id management site to change/add/verify

My Apple ID

https://appleid.apple.com/cgi-bin/WebObjects/MyAppleId.woa/

About FaceTime

http://support.apple.com/kb/HT4319

Using FaceTime http://support.apple.com/kb/ht4319

Troubleshooting FaceTime http://support.apple.com/kb/TS3367

The Complete Guide to FaceTime + iMessage: Setup, Use, and Troubleshooting

http://tinyurl.com/a7odey8

Troubleshooting FaceTime and iMessage activation

http://support.apple.com/kb/TS4268

Using FaceTime and iMessage behind a firewall

http://support.apple.com/kb/HT4245

iOS: About Messages

http://support.apple.com/kb/HT3529

Set up iMessage

http://www.apple.com/ca/ios/messages/

Troubleshooting Messages

http://support.apple.com/kb/TS2755

Setting Up Multiple iOS Devices for iMessage and Facetime

http://macmost.com/setting-up-multiple-ios-devices-for-messages-and-facetime.htm l

FaceTime and iMessage not accepting Apple ID password

http://www.ilounge.com/index.php/articles/comments/facetime-and-imessage-not-acc epting-apple-id-password/

Unable to use FaceTime and iMessage with my apple ID

https://discussions.apple.com/thread/4649373?tstart=90

For non-Apple devices, check out the TextFree app https://itunes.apple.com/us/app/text-free-textfree-sms-real/id399355755?mt=8

How to Send SMS from iPad

http://www.iskysoft.com/apple-ipad/send-sms-from-ipad.html

 Cheers, Tom 😉