Transfer from Shanghai Pudong Intl. Airport to Jin Mao Tower (Grand Hyatt)

We arrive at Pudong Intl. and would like to use the Maglev first. From Longyang Lu station, what would be the easiest way (least amount of walking) to Jin Mao Tower, open to use buses as well.

In order to use Maglev, metro and buses, I guess the transportation card would be the best way to go. Is it sold at the Maglev station at Pudong airport? What amount would you recommend to load on the card for a 4 day stay at Shanghai?