Ok, if its started, the it should already have all its shots. But you will want to put together a basic first aid kit. Maybe $50.
You dont really need a dog box, i just have a chain that runs across the front of the bed of my truck, since its warm all year long, and they get snaped to it, but if you want a box, i would figure between $300-$500 dollars depending on what you want.
A 50 lb bag of feed is going to be between $18 and $30 depending on what you want, and a bag should last one dog atleast a month.
Im not sure exactly what you are looking at as far as a shock collar, someone else on here can hit on that.
Its up to you, and how you want to hunt as to weather or not you need a tracking cystem, but if you do want one, i would figure between $300 - $500 dollars for a single dog system.
If the dog is outside, you will need a kennel, or chain to keep it. A kennel you are probably looking at close to $200, and a chain $30.
You will need a house, you can build your own for about $50, or cut a hole in the end of a barrel, and be into it about $10. Or you can but a nice alluminum insulated one for about $120.
I would figure about $50 a year for wormer for one dog.
But keep in mind, that you really dont need any of the things on this list to hunt and enjoy a dog. Food, and Wormer are about all you really need. It can be really cheap, or REALLY REALLY expensive!
Good luck, hope this helps.