Is Promoting website or blog in free classifieds to get traffic to the site or blog against adsense TOS?
We can feed it. There is no problem as per my knowledge. If there is any change, let us know over here.
No Absolutely not. You are entirely entitled to do so. Enjoy doing that. Just be aware of the fact that the Google's organic listings doesn't like sites being linked from free classifieds..rest you can decide for yourself...