No plastic lugs in the tail lights (unless there is an after market one available). You'll need some body sealer putty a bit like this one on ebay to both (sort of) hold in situ (applied to the hole in the body and the cast metal lugs on the surround fit in the hole while the top an bottom screw hold the surround in place.

Sorry I cannot help you with the tailgate rubber suffice to ask does it look like it should be retained with some form of adhesive?

Regards,

Dave.