Are birth records public records?

Somewhat. You cannot obtain a certified copy though, unless you are the person in question, or a relation with a proven right to it.

Yes, birth records are considered public records.

Yes

Financial records, like income for the company or it's expenses are not public record. Things like debts, in the form of a mortgage, or other documents like judgments are certainly accessible through...

No, a will is NOT a public record. Added: Once the person dies, the will is probated, or filed with the probate court, and then does become public record.