Is There Any Way To Part-time Train This Papillon?

My mother-in-law (who is my landlady) bought a papillon from a petstore, about eight months ago. She admits the puppy was an ‘impulse buy’, but loves him a great deal. I don’t believe in buying from petstores, and I’d thought she didn’t either, but this puppy reminded her of a dog she’d had before, so she bought him the day after she saw him.
The problem is, he runs wild. My significant other and I attempted to crate-train him when he was a puppy, but my mother-in-law didn’t like the idea of him being in a cage for any length of time, so she sold his crate and pen, and no more training was done. She does not discipline him at all, and he runs wild. He plays rough with the cats, steals food, and destroys everything in his path. I don’t think it’s fair to him to let him go without structure and training, but I don’t know how to train him alone, if no-one else will enforce anything. What can I do? I love this dog, but he ruins everything, and needs discipline.

Is There A Way To Stop My Papillon From Being Possessive?

I’m afraid I’ve spoiled her…
My five-month-old female Papillon and my two-year old male Yorkie are great friends when they are playing with each other. But when my Yorkie tries to show affection to me (licking my chin, laying in my lap, ect.) my Papillon growls and bites him till he gets away. Then, she sits on my lap and prevents him from coming closer. These bites are never hard, but it’s not fair to the other dog.
When people she is not familiar with come over, she barks at them and sits by me. It can take 30mins or more for her to stop barking, unless I pick her up.
Does anyone have a method (aside from dog training classes) to get her to stop? My Yorkie can never properly have peace and lay by me if she keeps being so possessive over me.