How can I go to Three Gorges Dam (Hubei), from Wuhan (Hubei) ?

You can take a high-speed train at WH Railway Station or Hankou Railway Station to Yichang first. It will take you to Yichang East Station, where transfer to the direct bus to Three Gorge Dam Transfer Center. Then you can easily change a bus to the scenic area.

how much it cost in total to go to Three Gorges Dam (Hubei), from WH (Hubei)? can you please tell me duration (time) and Money? alos If I wish to stay there for a night, how much a moderate type hotel/lodge cost?

The high-speed train costs CNY84.5-94.5 for a second class seat and CNY102.5-106.5 for a first class seat from WH to Yichang and it takes around 2h and 20min. I remember the bus fare from Yichang East to Three Gorge Dam transfer center is around CNY15. The whole bus trip shall be around 1.5h.

But there is a fee for coming into the dam area too. Preferably take a day tour from Yichang. I went there last summer and think the price was 120 RMB.