How Much Do These Dogs Cost?

I want another dog! all we own are border collies that are big time agillity dogs and most of the time they are training so this leave no “mans best friend” quailty time so this christmas i am asking for a small dog but my parents cant afford a couple thousand dollar dog and the dog i get for xmas is not going to do shows or agility cuz i know dogs that are bred for this cost more i just want a dog that will be my friend and loyal to me
Toy Fox Terrier
Papillon
Italian Greyhound
American Eskimo Dog (Toy)
Pomeranian
these are the types of dogs i have reserched and i am going to pick one that i would like to ask for for chrismas and
I would like to get the average price of each dog in this order 10 points to the best answer

Is It Too Dangerous To Keep A Large Dog With A Much Smaller Dog?

Right now, I have a two year old Papillon. But I love the Great Danes breed and have been wanting one for several years. In the near future, I may move to a place where I am able to have a Dane.
It would of course go through some training on not how to be rough with people (or dogs) but, aside from the fact that it may be odd or funny looking, is there any danger of keeping dogs of two drastically different sizes?

How Much To Feed A Papillon Puppy & Treats?

I have a 12 week old Papillon – so I realize he is still very young, but I was wondering how much and how many times a day I am suppose to be feeding him? I don’t want to over feed him – or not feed him enough, and I guess with that said, what kind of treats do I give him too?
Any other training tips would be nice!