Hi, i am the first timer to visit Shanghai and will stay for 5 days 4 nights

Definitely will go to the bund area, tianzifang, xintiandi, and nanjing road area, lujiazui, and zhujiajiao so far.

1. could you recommend me the accommodation to stay and strategic location to stay in the city? preferably nearby subway station if possible :)

2. And for public transportation in the city, as far as i know, there are subway and bus,
3. should i buy public transport card to commute there?
4. or just buy single ticket at ticket machine in every subway? which one is cheaper?
5. or any tourist travel pass for commuting subway metro and bus?