I am not sure if you have a case though

1. Previous owner disclosure: you need evidence that the basement was flooded during the period when the immediate former owner resided, and that the owner purposely made a false statement ignoring this fact.

2. Inspector: we all know that molds grow fast. You didn't find them 2 weeks after you moved in. How do you know that those molds were there when inspection was performed? Were you present during the inspection? Even if you discovered the molds during final walk-through, you may not have a case against the inspector unless the inspection was performed immediately before your final walk-through.

3. Your realtor: s/he has nothing to do with it.

Is it possible that the previous owner used a dehumidifier in the basement and you didn't?