Where I can find a bus timtable, route map and the frequency of buses in Shanghai?

There is no a map of the routes, but the main stops are listed on the page. You can take it as reference. Well, the line 1 operates from 09:00 to 21:30 and line 2 operates from 09:00 to 19:30.

The sightseeing bus is different from Big Bus Tour. The former has two lines and the latter has three lines (red, blue and green lines). Both of the packages show you the beauty of the city. But the former only costs CNY30 for unlimited hop-ons and hop-offs within 24h and the latter costs CNY300 per adult.