Moving to Rotterdam in May! :)

Hello!

My Husband, myself, and our 1 year old son will be moving to the Rotterdam area next May! We are moving via the DAFT treaty :) We run an online business. Couple questions for everybody...how much are tram/bus/train tickets a month? Can we purchase a pass? Good bikes that will carry a one year old and groceries and such? Also, what are some sites that we can look at to rent apartments from? I'd prefer to find a site where we do not have to go view the place with others and be the one chosen for the place, if possible! Anything else that you guys might be able to help us with, I would greatly appreciate it!
Thanks!