Hi! She is a little cutie pie! Since she is only six weeks and has not had all her shots-and you live in an apartment,not a private home, I would wait to take her out until she has had ALL of her shots. There are probably other people with dogs who walk them in the area you will go, and she could pick up an illness, or infection pottying where other dogs have been. Not all people have their dogs up to date on things.
Also, it will take a lot of patience and repitition to stop the biting. get some safe toys, such as nylabones for her to chew on and whenever she bites you, say "no bite" and stick a toy in her mouth and say "here, bite this!" You will probably have to keep this up until after she loses her puppy teeth. AND enjoy the potty pad thing-because they are really good at first, and then they forget all about it!! Patience and repeat!