went to Bromo Mt. last week.
Travel Info :
Transportation; Car from Malang and Batu cost around IDR 250.000 - 300.000 include the driver and gas.
once you arrived to Bromo, you have to rent a Jeep which is cost IDR 250.000 to the Sea Ocean and rent a horse, cost around IDR 50.000-70.000 to climb the mountain, next you have to reach the top by 200 stairs.
once you reach the top, enjoy the view.