I agree with the above advice, except....Have him checked for a microchip before you make any firm decisions.
After that, I would take him to a vet asap for a checkup and to begin his shots (since you have no records).
The vet check is essential. You have to consider the safety of your other pets as well.
Best wishes. He sounds like a sweetie.

Welcome to YT!
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The fullness of our heart is expressed in our eyes, in our touch, in what we write, in what we say, in the way we walk, the way we receive, the way we need. -Mother Teresa (
RIP Gizmo 3/9/07-8/18/12)