While I am not, in any way, trying to defend the breeder, she isn't here to defend herself and they may have been other circumstances of which we are not currently aware. I don't think it is fair for us to so harshly judge the breeder when we do not know all of the facts.
Sometimes, when kittens go to a new environment, stress and exposure to the elements of that new environment can wreck havoc on young systems. Issues with getting a kitten to eat or inappropriate elimination behaviors can result. I am not saying this kitten doesn't have problems, it is clear that he does, but blaming the breeder is quickly pointing a finger of blame where it may not be warranted.
No matter what you decide to do with this baby, you must get him to eat something. Try some chicken meat baby food (human variety - no veggies or onions, meat and broth only) and see if he won't eat that. While it isn't a long-term nutritional plan, many cats love it and eat it readily when they aren't eating anything else.
As for the inappropriate elimination, stress is a primary factor for cats to develop a urinary tract disorder or infection. I have never seen it happen in a kitten of this age, but I won't rule it out completely. Additionally, we have to remember this is a little baby and he may have a few accidents -- you should probably keep him confined to one room of your home for a few days along with his litter box, food and water dishes, a few toys and a warm cozy bed until he gets the hang of using the box consistantly. Spreading out boxes in different rooms will be confusing for now. Keep things simple and keep his range of freedom a bit more restricted until he learns he needs to use his box.