How old is this? Has this actual piece been restored?
This is from the late 3rd millenium BCE or over 4000 years ago. The wooden axels have been restored, but the terracotta is original! Animal shaped vessels were popular in numerous ancient cultures for various purposes. This ram-cart shape was used by Sumerian people when the 3rd Dynasty ruler from Ur in Lower Mesopotamia. It likely had a funerary or ritual purpose.
How was this used?
This vessel from ancient Mesopotamia (modern-day Iraq) would have held some form of liquid, either wine or water and used for a ritual purpose. You'd pour the liquid from the top of the head and once the vessel filled up, the over flow would pour out of the snout.