Online Business Buzz

I am starting an online business and I would like a list of ideas and related information and links on how to inexpensively advertise and get the most bang for my buck. If you could include ideas on how to advertise to USA, Canada, UK and Ireland, New Zealand, and Australia since it will service those countries. In this case web advertising would probably be the best idea. P.S. If you could include a range price estimates on Google Adsense and Google’s “Sponsored Links” section and SEO to get organic placement on Google for free.
Thanks a bunch!!! If you give a few good answer I will give you to “best answer” — guarantee.