Answer:
Look into my face and I'm everybody. Scratch my back and I'm nobody.
What is neither inside the house nor outside the house but a necessity for any home?
What wears a coat in the winter and pants in the summer?
People like this usually live in rural areas, unless they are lucky enough to strike oil and move to Beverly Hills.
Always wax, yet always wane: I melt, succumbed to the flame. Lighting darkness, with fate unblest, I soon devolve to shapeless mess.
What never gets any wetter no matter how hard it rains?