Since most passengers sit in the backseat, I wasn't sure about this. My current vehicle only has one airbag, on the passenger's side. I don't have one on my side because of the dangers. I always wear a seat-belt and have my windshield lined with glass tape. I also keep a pillow on my lap. I know it sounds silly but airbags freak me out. Is it okay to be driving without one?
Seriously you need both airbags fully functional. True most passengers sit at the back but some passengers love sitting at front having a clear vision of everything happening on the road. I wouldn't say it's not safe driving with one but you should really get complete airbags functioning well.
You need to pass a vehicle inspection which will test for this. While it is not required to drive around with both airbags, you are required to have them to drive commercially. I would ask them directly given your situation is not the same and you do have the passenger airbag installed.
I'm not actually sure about this. There may be a way around it but you should probably just make sure both airbags work anyway. You don't want to forget some day and have someone in the passenger seat.
Some states don't require it when passing the inspection test for the car. You would have to call them and ask. I think it is a good idea to have both regardless because you might pick up a group of people and someone may need to sit in the front seat with you.
Yes, you need both to function. Even if you don't plan on having anyone in the passenger seat, you will still need one in there to pass the motor vehicles inspection.