[Sunnie]

First let me say welcome. In answer to your last question, please do NOT buy from a pet shop. Reputable breeders do not sell to pet stores. if you want a healthy puppy, please get it from a reputable breeder who tests thier dogs for genetic defects and health problems.
As far as color, it is hard to tell what color they will be when they are 8-12 weeks old. BUT look at the mom and dad. That usually is a good indicator. Ask the breeder if the parents have been bred before and if they know what the puppies coats were like as they grew older. Your breeder should become you best source of information about how your puppy will turn out although none of them can give a guarentee as to final adult size, color, etc. They will certainly be much more accurate then a pet store. I am so pleased to see you asking all of the right questions before picking out your new baby

Sonya