The official taxi of Surabaya (and Indonesia) is the blue bird company. You can recognise these taxis by their blue color. They have got the best price for you and they are always willing to go on the meter. You will find these and also other freelance taxis at the cruise terminal on the parking lot. Rule of thumb and easy calculation for you: if you let the Blue Bird taxi of on the meter it will coast about 10 USD per hour.