My hen had 14 in her first nest, and if it hadn't been raided, I don't know how many would have made it, but all of the remaining 8 hatched. I would think that if you stored them point down in a carton for up to 16 days at room temperature, they'd still be good. I can't see a turkey having any more than that.
Turkey eggs take 28 days to incubate, and you treat them like chicken eggs. You need to keep the humidity between 40-60% for the first 25 days, then increase it to about 75% for the last three days. They're not the smartest babies, so when you give them food and water, toss in some colorful marbles so they'll peck at them. They like shiny and sparkly things, so their curiosity will cause them to peck, and they'll "discover" their food and water. Some people will hatch chicks with them so the chicks will teach them how to eat and drink.