sir i think you are having serious confusion for Hybrid as maintenance free vehicle.
like every other conventional car it also needs maintenance which again require specific coolant, transmission fluid, ac refrigerant recharge etc which hardly exist in local market, to source it costs more then conventional maintenance items.
Just for sake of an idea walk to your nearest motor parts market, ask Hybrid coolant fluid for Prius there will be several recommended brands. Toyota Genuine you can judge with the price and date of manufacturing printed over the tin. The Genuine Toyota Hybrid is same coolant for all Toyota Hybrid but when you ask for Crown Hybrid coolant it will be 2.5 times the price of Prius coolant though the container is the same.
