I commute TO Bergen County from NYC by bus every day through the Lincoln tunnel. It works pretty good. It depends on where you are exactly, but you can get a bus card for like $100/mo, rides on my route are $3.20 each way otherwise. A lot of people use the ferries. Also PATH, but that isn't a very attractive option from Bergen. I wouldn't drive into Manhattan daily for, well, antyhing pretty much. Some people do it and rent a parking spot there. My cousin's employer splits the monthly cost for a spot with him. It is three hundred and something a month, I can't remember exactly, downtown.
http://njtransit.com