Bobby,
Did the seller disclose in the listing that it was cracked? If they did not and there was no indication from the pictures or the item description that it was cracked, you should try to return it to the seller. If it was damaged during shipment, that is another story.
If you cannot return it, I am not sure if it can be used as a cooking utensil. It may depend on what you are cooking. Liquids might leak through that big crack in your Dutch oven. You might be able to have it repaired so that it is usable. Some members have experience with having cast iron welded, but there is a lot of preheating and other considerations for that type of repair that may make it prohibitively expensive. Brazing and silver solder are other techniques that you may want to consider.
Good luck with it.
Jeff