Would this be a good diet for a chihuahua? How much?

If adopt a dog, get it DOG FOOD. Not people food. As for chicken bones THEY can choke on uncooked as well as cooked especially the smaller breeds like chihuahua's. I think that before you seriously adopt a puppy, you do a little research on the breed you want. The diet you have suggested will lead to a Malnourished dog. That is if it doesn't die from the chicken bones.