Sorry if this has been done before, but I searched it, I swear!

I start my first job in June (1st real job), a great place for bike commuters. I get a locker and access to showers, and there are plenty of bike paths. It's truly a great place to work. The problem is, I'm probably going to be working the night shift for a while. 10PM to 6AM. The bike in and out of work will both be in the dark. The good thing is that between the low traffic and the high amount of bike paths on the trip to work, I'm confident this can be done safely.

What I need to know from you guys is:
1. What Lights can I get that will do the job and wont break the bank!
2. Should I use bike paths at night? Is that legal usually?
3. Is there anything you think I should know before I choose to do this?

Bike commuting was great last summer. I got in shape, picked up a great hobby, saved on gas, and felt healthy. Now that I'm leasing a car (the old one blew up ) I have to keep the miles down and the long distance relationship I'm in just got longer, so that is important too.

Any advice would be great. Thanks in advance.