I am from Florida, so the idea of wearing that dress in 50 degree weather is giving me hypothermia at this very moment!
I vote for:
YES hose! Although I hardly ever wear them, I do think they're appropriate for cooler weather.
NO to the strappy shoes (I know that wasn't a vote, but strappy shoes with hose on your toes say "Nursing Home" granny to me, I just don't go there, I think it's a tad tacky). I would wear closed toe with the hose... or even black hose that are a bit more opaque.
YES to a cute shrug or scarf-y type thing for her shoulders (34 degrees!!!!)
NO to the necklace. The dress doesn't need one.
... and if she must wear the strappy heels, Victoria's Secret has great lighter colored nude hose that are open toe. They have a little loop that goes around your big toe to keep the hose from sliding up your foot and leg.The hose end with a little elastic where your toes begin.