1) We booked the tour with our hostel at about NT$900 per person. It included a guide who drove us (together with 2 other tourists) to and fro from the National Park (and other attractions, depending on whether time permits) in a SUV. It does not include food and drinks (and you will have to pay for the guide’s lunch as well, which is pretty common practice). The good thing is that the timing is very flexible, you can spend as much time as you want in each destination as there’s no strict schedule to follow. The downside is that the price is a little steep, but given the limited public transport available, I will advise to still go for the car as it’s a lot more convenient and comfortable. If you want to book a car with a driver for the whole day, it will cost about NT$3,000 (if I didn’t remember wrongly) for up to 4 people.