Do you know what you need to make homemade applesauce? Apples. Water. Heat+time. A potato masher. (Maybe a scale, but if you weighed the apples when you bought them that's close enough.) That's all!!
Peel, core, and slice the apples into small chunks. Add to a pot with 2 ounces of water per pound of apples (or so). If you'd like, add some cinnamon and/or a splash of lemon or lime juice. Bring to a boil and simmer, covered, for about 30 minutes. Mash. Eat.
I used two very large apples, which was about 1.5lbs of apple, and got about 2.5 cups of applesauce from them. Yum, yum, yum.