Awww, CONGRATS and WELCOME to YT! I'm so excited for you and your new addition - can't wait to see some piccies. I bet the little punkin' will rule the roost.
As far as clothes - a lot of people do use them here on their yorkies. If you look in the Yorkie Products For Sale section, we have lots of sellers there. Also, if you need boots for the colder weather for your yorkie - definitely get in touch w/ AllDogBoots.
You sound like you have such a great group of furkids - like they're a little pack
.