Should I Borrow My Parents Older House Trained Dog To Help With My Puppies?

Ok here goes… I have three… count them 1…2…3 puppies currently residing at my home. There are two husky puppies that are 10 wks old and a papillon that is six months old. I’ve had dogs all my life, it’s just been a while since I had to deal with puppies. I’m working on house breaking them right now… all of them. My parents have an eight year old dachshund mix who has been (obviously) housebroken for years. Should I ask them if I can borrow Grettel (dachshund) for a couple days so they can see how it’s done?
I’m in training to be a dog trainer… so they’re well behaved, all three sit, stay, come, and lay down on command… they’re just having trouble with the going potty in the house.
I know I need to buy crates…
I know that is a lot of puppies… trust me… I used to run a rescue center with my family in California… this is nothing for me… I just need some advise.

If I Adopt A Older Papillon, What Will I Need For It/ Need To Do?

It says that she is potty trained, but I do not have a doggy door. Would it be hard to retrain her to stand at the door?
I heard you have to brush their teeth. Do you buy a regular tooth brush, and what do you brush them with?
Anything else I would need to do/ need to buy?
I already have another dog, so I have food/ water dishes, etc.http://www.petfinder.com/petnote/display…