1. Viveca would provide the robots an antidote that functions more like a shock to their system than anything to ingest.

2. Basically, yes! Unless they are woken up by character powers, then from the second time onwards, they will be stuck in the dreamscape.

3. Surprise of surprises, you are correct in that the answer to this can be found via search requests.

4. Same here, this is something that can be asked in a search request, re: the NPCs! As for the dreamscape, multiple outsiders can wander into the same dream.