Setup our new office printer Xerox WorkCentre 6655

We have Xerox Workcentre 6655 and I setup it so it can print with wi-fi, but a) I can't figure out how to make the scan to email work on this printer. b) when we reset wi-fi router, it's losing IP and we need restart printer as well. c) We also need to setup user printing. Basically, we have an office, and we will be charging users for each copy. So, we need to create user logins and passwords, both on their laptops and on the printer itself d) We also have couple office computers that needs to be setup for different users that will work automatically with printer under this user.