After a few failed attempts, it looks like we may have FINALLY found our girl!! We're talking to the breeder now about when we can pick her up.

She's 8 weeks old and just absolutely precious. We're excited, but trying not to get our hopes up too, too much in case things fall through.
I'm mainly posting 'cause I have alot of questions. We have a shih-tzu who, of course, is much bigger than this puppy who we're told is 1.3 pounds. Spanky (shih-tzu) did okay with Kelli, but she was much bigger and full of spunk and could take care of herself. I just want to make sure that everything will be okay. Spanky's not here full-time, he'll only be here until March/April (we keep him in the winter because my Grandparents can't take care of him in the ice, snow, and cold).
Also, I've read about some people having playpens? Are these just NORMAL playpens or are they made specifically for animals? I'm sorry if I sound a little silly on that, I'm honestly really curious and we thought that would be a good idea because we don't want to crate her.
What other things should we get besides a jacket and/or sweater? Is there any kind of food that would be best to give her? I'm open to all opinions and suggestions. Thanks, everyone!