Welcome Ron (?)
the things you describe are not "broken", they are just missing features or they are already available (in upcoming FG versions).
- Pusback: not possible to do this over multiplayer at the moment. You can however, pushback your own aircraft (if it is equipped wit a pusback). Aircraft like 777-200, 747-400, CRJ-200, F-16 and several more all have this option, as of FlightGear 2.0.0.
- Parking gates (jetways): http://wiki.flightgear.org/Howto:_Animated_jetways
- Luggage truck: A340-600 has them.
As FlightGear is opensource, you're invited to work on the missing pushback-over-mp feature! It does require knowledge about FDMs, probably Nasal or C++, so it might be better/easier to start your FlightGear Developer carreer with someting less complicated...
Cheers,
Gijs
PS: I deleted the other copy of this topic and moved this one to the "New features" subforum.