Welcome to Sheila and Teddy. Puppy biting is rough. Teaching them the Leave It command is what I would suggest here! Reward when they stop, make sure they are getting plenty of exercise and distract onto a toy if they start.
Welcome to Claudia and dogs Sammy and Rose! Toilet training is hard but with consistency can be done ! Head over to the puppy section and get going on the free tutorials there- let me know if you have any questions