how do i aprk at gatess, also how i make the cargo, food trucks etc come
You need to contact ATC and they will tell you where to park. If you fly an A340-300 ATC will tell you your gate and the taxiways you need to go through to get to your gate. This happens when you land and you contact Ground Center using IFR.
? dont you need a add on to make trucks come?
Yes, it is not standard within FS9
try putting the autogon and scenery dencity settings to very dence then you get trucks (well it worked when I did it) but they dont move.