Puppy Training Biting And Peeing?

I just got a 6 week and 3 day old cockapoo puppy (cocker spaniel and mini poodle)
She keeps biting my slippers and everything else she finds attractive to naw and bite on. How can I control her from biting? She also likes to bite my fingers so i say NO and walk away. Is that the right thing to do?
One more problem is that she pees everywhere she pleases. I would like to have her house broken but is it too early?
Also, how often should i feed her.
everytime i add new food to her bowl, she finishes it. I’ve fed her 3 times with in 4 hours. Is that normal?