Baidu PPC is similar to Google PPC, the cost depends on the which keywords you buy and how many clicks you buy.
You can find a brief summary of Baidu PPC cost at:
It is difficult to run a Baidu marketing campaign by yourself. There are many absurd requirement. You'd better to find a Baidu Ad agent. For example, Glogou Inc. In additional to be Baidu ad agent. Glogou also developed the world only English interface for Baidu Advertising program. (If you do not speak Chinese, you will find it useful, http://glogou.com/adbaidu/)