Legal Question in Wills and Trusts in Florida

No. His estate would be responsible for his credit card bills. However, that being said, his credit card debts may reduce the amount of the estate his children may receive depending on a number of other factors.

No, but his estate is up to the value of the estate (with some provisions for exempt property that it is not attachable). If there are no probatable assets, then the debts go unpaid.