Physically the thrust levers must be in idle for the reverser levers to be moved through the interlock position. This is in addition to the aircraft being on the ground with the main trucks untilted.
The spoilers will operate once the main gear trucks untilt. This assumes they are armed. If the thrust levers are advanced on the ground the lever and spoiler panels will move to the down position (retract.) Of course they can be manually activated at any time, and irrespective of any other condition. In other words "you want them, you've got them!" Thrust levers idle or full, they can be manually deployed.
The brakes will operate whenever you press them. Autobrake will disarm if the throttles are advanced on the ground.
As has been mentioned above, the two main items for the PNF (NHP) to monitor on the ground are: That the spoilers deploy (speedbrake lever moves to the up position,) and that the the Autobrakes (if used) don't disarm. In either case manual input would be required from the PF (HP.)