Check Petedge.com, they are a wholesale supplier for vets, groomers, breeders, etc. They don't have instructions on what you need, but it's a good place to order from. They do have grooming books though...it depends how much you want to learn about grooming. Andis and Oster are the best brands for dog clippers. Andis is quieter than Oster which is good for fearful dogs, but Oster has excellent speed. I prefer Andis myself, but a lot of groomers prefer Oster. It's just personal opinion. I haven't tried Buddy Wash, but I prefer the BioGroom products. I'm not sure if Petedge sells Buddy Wash or not. I don't think I've seen it there.
There are several good websites from show breeders with grooming instructions. Here is one that has good info:
Jon-An's Yorkshire Terrier Coat Care
Hope this helps!