You'll need to consider contingency plans, such as using a co-worker's car or taking a cab in emergencies. There are many ways to skin that cat. Riding at night isn't a big deal if you have proper lighting and bright clothing. I need to drop off and pick up my child on the way to and from work. It's as good idea as wearing a seatbelt in your car, though you're not legally bound to do so.
Most commuting gear is the same as the gear for any safe biking.
Of course, there are some extras for special comfort. See the gear checklist . It can be as simple as a rubber band, or you can get a special velcro strap or metal leg clip from a bike shop.