Question For Papillon Owners . . .?

I am considering a puppy in this breed for my family, I was hoping someone could answer some questions for me about them:
1. How much do they shed? Will I have a hair problem, trying to keep my house clean?
2. Is this a dog that I cant trust not to take off to explore, or can I walk it without a leash (After some training of course)?
3. Can they be trusted alone for an 8 hour stint while my husband and I are working?
4. How would you rate their tendency to bark?
5. Does the long hair tangle and need consistant grooming?
6. Does this dog like to swim?
7. Is the male or female better behaved?
8. How much does this dog generally go for (Cost)?
Sorry I had so many questions. As many answers as I can get would be great. Thank you all.