1. there are so many buses departing from Tiananmen to Wangfujing, such as 120, 59, 126 and 20. On the other hand, you could take the subway Line 1 to get there more promptly.
2. At the Tiananmen Dong bus stop, you could take the bus 120 and 20 to arrive at Tianqiao directly. Just 4kms from each other.
3. it is suggested that you walk to Qianmen from Tiananmen, and then take the subway Line 2 to arrive at Fuchengmen station. Exit from the subway station, you could walk to the market easily. This is more convenient than taking a bus.