-You do not need the fogger and I'm not real sure what a hand held mister is. I think most of us just use the plastic spray bottles from Wal-Mart or the Dollar stores.
-You are going to need 2 hides, snug and dark. Preferrably not the half logs. Cave type hides work best, and there are a variety of them availble, or you can use small flower pots or cheap plastic bowls with a hole cut in them. I prefer plastic hides because they are easy to clean.
-As was said above, you don't need the lamp unless the ambient temperature of the room gets below 75 degrees. There is nothing wrong with using a lamp, but you will need to be more vigilant with the humidity. One thing you can do to keep it up is to cover most of the the screen top with aluminum foil. When I was using screen top tanks, I wrapped foil around pieces of cardboard so that I could add or remove them as needed.
-For the Under Tank Heater, I do not recommend permanently sticking it on, (some come with adhesive to do this). Using Aluminum tape to hold the thermostat probe and UTH in place works great. It will hold and is also easy to remove if needed. I also recommend when taping the thermostat probe in place, to put the tape on the robe wire instead of the probe tip.
I hope this helps some...