Answer:
Although I may have eyes I cannot see. I have a round brown face with lots of acne.
David's father has three sons: Snap Crackle and ?
Brown I am and much admired; many horses have I tried; tire a horse and worry a man; tell me this riddle if you can.
I am the ultimate killing machine used not once but TWICE I can be made by humans.
Every dawn begins with me. At dusk I'll be the first you see and daybreak couldn't come without. What midday centers all about. Daises grow from me I'm told. And when I come I end all code but in the sun I won't be found. Yet still each day I'll be around.
A doctor might remove one from the neck of a Dracula victim.