1. Login with your Blogger.com, provide your username and password.
2. Select your blog from the Dashboard on which you want to display advertise.
3. Click on Layout Tab.
4. You will see the text in the layout publish with the adsense click on this link.
5. Login in with the your existing Google adsense account , provide your username and password.If you do not have the google adsense account then apply for the google adsense accout but before apply please read the steps or policy for the getting approved from the google.
6. Say Next and Choose the place where you want to display the advertises.
7. Say Next and You will be getting the message your blog is enabled now with ads.
8. Click on view in Browser and look at your blog.
Now your blog is running with third patry ads. Enjoy Earning !!!