Except as provided in § 46b-136, reasonable expenses of, or incurred by, the commission, the Chief Public Defender, or those serving pursuant to the provisions of this chapter, including rental of facilities, witnesses summoned, costs of transcripts ordered from the official court reporters or court recording monitors, costs of service of process, and costs of equipment, and other necessary disbursements or costs of defense shall be paid from the budget of the commission upon approval of the commission.