It could be the clutch or transmission. Having a transmission rebuilt can be more cost effective than a whole new one. You will have to check out what's available to you and consult your budget for the repair.
sounds like the link on the box has poped off have a look under the car at the selector arm if its not moving the shaft its the gear linkage in the car
If the cruise lamp comes on and the cruise does not set i would advise inspecting the cruise cable and make certain it is not broken, if ok the the servo has likely failed.