I'm so sorry this rescue didn't work out for you, but you certainly don't want to take on a biter. I'm a bit shocked that they didn't tell you beforehand that this dog had aggression/biting problems. Was it an "official" rescue or just an owner trying to dump this dog on someone else?
If you are interested in adopting a rescue, I'd stick with a recognized rescue group. All their dogs go to foster homes first and are evaluated, then placed in the best situation for their particular personality. They are also checked by the vet and have dentals, spaying or neutering, updated on shots, and their general health is assessed.
Adopting through an newspaper ad is sort of like buying a used car - buying beware!