is there a direct bus from hongkong airport to disneyland? if so, how much?

Well, as I heard, sightseeing coaches are available directly from HKIA to the park, but am not sure about the fee. You can dial 852 2738 9500 to consult more info about the coaches. Alternatively, you may take shuttle bus line S1 to Tung Chung within 25min and then transfer to Tung Chung MTR line to Sunny Bay, where you shall change to Disneyland Line to reach there directly. For the whole trip, it costs around 18HKD per person.