If your incubator is still air, about 101.5 degrees. If it has a fan, 99.5-100 degrees.
If you're new to candling, wait till day seven. Use a bright flashlight (preferably LED), or look on here for posts of homemade candlers. Look for veins in the candled eggs. A post on here from AKBirdBrain (use the search function) shows excellent pics of candled eggs.
Incubate until the eggs hatch, LOL, it's 21 days for chickens
Turn as often as you want, generally at least 4 times a day. Stop turning on day 18. Then raise the humidity, and wait....and don't open the bator in the last few days!