Can I use Beijing bullet train to go to yuntaishan? And if can, how much money do I need to spend?

For Yuntaishan, do you refer to the one in Jiaozuo, Henan Province?
If so, there is no bullet train to reach. You can take the bullet train to reach Zhengzhou Railway Station. Then go to ZZ Central Bus Staion, there you can find one bus for Yuntaishan directly at around 08:20e everyday.
The train ticket fare is around 214 to 309RMB per person for second class seat. The bus from Zhengzhou to Yuntaishan costs about 50RMB per person.