This section applies only to commission counties. The county commissioners of a county shall: impose taxes on property within the county subject to taxation; and provide for the collection of the taxes. The imposition of taxes required under this section may be made by the county commissioners of a county wholly or partly by estimate. The county commissioners of a county shall use property tax revenue to: support the courts; compensate jurors and county or State witnesses; pay outpensions established by the county commissioners or by the trustees of the poor; pay the funeral expenses of the poor; and pay and discharge all claims on or against the county that have been expressly or impliedly authorized by law.