Going back over ground already covered:
It sounds like to me, that your keyboard assignments, in P3d Options>Controls, are either incorrect or missing. (I deleted mine and had to re-assign them with Kevin's help)
When you re-assign them on your full-size keyboard, make sure that your NumLock is activated. You need to re-assign (or check that they have been assigned) for: 1,2,3,4,5,6,7,8, and 9 into the P3d Yaw mode assignments. Along with F4, F6, and Y.
Regarding passengers walking around on the tarmac. I think you have accidently assigned feature that for the gate you are at. Personally, I would look at the full file name, up the top, and go in and delete that specific airport file and start again.
Assie