We was thinking of sell some advertisement on our web site is that against adsense TOS ? Is good to know before doing something that is not good for our company.
You are allowed to display other ads, as long as they don't look like Adsense ads. Read the official policy here: https://www.google.com/adsense/support/bin/answer.py?hl=en&answer=32849 Also remember that you are not allowed to link to content that breaks the program policies, so no linking a banner to a porn site, a gambling site, etc.