How to register my new IPad.

Apple ties warranty to the serial number of a device. It does not register them to a person. You can verify warranty via either of the following:

My Support - Official Apple Support

or

Check Your Service and Support Coverage - Apple Support

How do I register my new MacBOok Pro?

Same answer:

Apple ties warranty to the serial number of a device. It does not register them to a person. You can verify warranty via either of the following:

My Support - Official Apple Support

or

Check Your Service and Support Coverage - Apple Support