Re: Two noob questions
First question has been discussed MANY time here, I'm very surprised those threads didn't show up on a search. Maybe one of our resident search gurus will post some links for you on your first question.
As to your second question, I seem to recall someone put something like a rack mount on a bike and added padding to it for carrying a passenger. I do not remember how it worked if at all as it was a long time ago.
"I would rather be exposed to the inconveniences attending too much liberty than to those attending too small a degree of it." - Thomas Jefferson