I've been watching this question for a while, and since no one has jumped in with an answer I thought I'd give it a shot to get you started (if you haven't already google'd yet). I'm a coredata (and iphone app development) newbie too, here are the resources that I used to get me started:
The Stanford iPhone App course: https://podcasts.apple.com/us/podcast/iphone-application-development-winter-2010/id384233225 has a good CoreData aspect to it, as part of the Paparazi series of assignments.
with slides here: https://web.stanford.edu/class/cs193p/cgi-bin/drupal/downloads-2010-winter
As you probably know, the iPhone Developer space has a lot of tutorials and sample code here: https://developer.apple.com/ios/
And, this tutorial looks quite thorough: http://www.techotopia.com/index.php/An_iPhone_OS_Core_Data_Tutorial
I know I'm not answering your question (especially relating to Migration), and since you asked over a week ago you've probably google'd it yourself - but hopefully a couple of these resources help you out as they helped me.