If I divulge information (non-criminal) to an attorney on a "free initial consultation", does client confidentiality exist or may he reveal the information to others? In other words, if he declines to represent someone, is the attorney bound by anything other than his own ethics to keep the client's information secret?
On the facts that you recite it appears that an attorney-client relationship was established. If so, then your communications to your attorney are confidential even if he/she did not take the case or if you decided to not engage that attorney. That is covered both by statute and Rule 8 of the Tennessee Supreme Court Rules [which has many parts].
These comments do not constitute legal advice. They are general comments on the circumstances presented, and may not be applicable to your situation. For legal advice on which you may rely consult your own lawyer.