Bus to Putuoshan from Shanghai

Hi,

I will arrive at Pudong Airport on 26th Sep night and plan to stay 1 night in Shanghai before next day morning off to Putuoshan by bus from Tourist Center under Nanpu Bridge. My questions are:
1. I'm afraid if can't get the bus ticket on the spot as it's almost golden week holiday. Is it able to buy bus ticket online?
2. As i will arrive in Pudong Airport around 11pm, do i need to stay in hotel near airport and near Tourist Center? How much taxi fare from Pudong Airport to Tourist Center? I will travel with 2 elderly.
Thank you.