Well, the collection attorney is full of bull about 'different kinds of judgments'... geez.. he's trying to dodge and scare you is all that nonsense is about.
Your husband works, therefore he's not entirely judgment proof, they could garnish his wages. If you haven't any non-exempt property they can't sieze a damn thing.
Who knows why he wanted to know who repo'd your car, that wouldn't get him anything anyway, but you will probably end up with a collection agency calling your for a deficiency on that too. Again, I think he's jerkin' your chain, not a thing he could do with that information - except to verify that the repo was real.
When was the last time you paid on this Visa anyway ?