Answer:
How many bricks does it take to complete a building made of brick?
My second is performed by my first, and it is thought a thief by the marks of my whole might be caught.
What always comes into the house through the keyhole?
What has 4 fingers and a thumb, but is not living?
Noah survived one and it was great
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.