The puppy should not have had any accidents inside her crate. I'm worried that her crate is too large for her. It should only be large enough so that the puppy can stand up, turn around and lie down comfortable. If you give the puppy too much space, she will potty in the crate. To make the crate smaller, put something non chewable in it to take up space. Then when the puppy is older, you can take the item out.
As far as the biting goes, where did this puppy come from? 7 weeks is very young for a Toy Poodle puppy to leave her mother and littermates. Staying with her littermates until older would have helped teach "bite inhibition" because if she bites Mom or brother, they bite back!
There are a number of ways to teach a puppy not to mouth. You should do a search on this forum. I like to firmly grab a puppy's muzzle and squeeze, but that will be problematic on a little Toy puppy. Perhaps a squirt bottle would help.