I am going to say that I would have him neutered first. This may help calm him down and turn him into a mushy baby. Also, can you start to "clicker" train him???
My TJ was a terror when he was younger too and through consistant training and reading books on agrression (check out dogwise.com ) we have overcome this.
However, if you find this is too much for you, please don't dump him at the pound. There are a good number of Yorkie Rescues in the NYS area:
Rescue Me Yorkie:
Surrender Application
Yorkies Inc:
Available Yorkies
Save a Yorkie:
Welcome to Save A Yorkie Rescue, Inc.