The budget shall include, among other things, amounts necessary to meet the requirements of interest on, and sinking funds for, the outstanding indebtedness of the city and amounts necessary to otherwise pay the public debt for which the full faith and credit of the city has been pledged. The budget shall also include such amounts as are necessary to pay such judgments and parts of judgments as the city may be required by law to pay. The budget shall include such other items as are necessary for the functioning of the city of Purcell and as may be prescribed by state law and the city council from time to time and shall be in such form or forms as the city manager, the council and state law may from time to time decide is appropriate.