Day passes, regional passes and special tickets that include 青森市営バス路線情報, cheapest first. Prices and rules change: check the official page before you buy.
Not checked for this operator yet. Many Japanese local buses work like this, but check with the driver: board by the rear or middle door and take a numbered ticket (整理券) if there is one; pay when you get off, at the fare box next to the driver, with the fare shown under your number on the fare display (運賃表). Demand-responsive services (デマンド, 予約制) need a booking first.
General guidance, not a fact about this operator. Signs and phrases.