Train from Pudong Airport to Holiday Inn Express Zhabei

Yes, of course you can purchase the 3 day metro pass.

In fact, the bus is more convenient than the metro for you. Line 2 cannot direct to SH Railway Station. However, you can take the bus line 5 from the airport direct to SH Railway Station, which takes about 1 hour 20 minutes. After getting out of the station, walk north about 1km, you can get the hotel.