I would like to know how effective, internet marketing is eg: if you have paid to have a banner on a website, or had your site optimised to appear on the first page of search engine. How has the following worked for you

Banner ads/optimisation = how much more traffic on your website = How much more calls you have recieved and business gained?

i would like to know what your experience has been and if it has been worthwhile.

I bought a domain, now i want my website to be at the top of a search engine. can anyone give me a reliable site where i can purchase keywords?

I want to advertise with pay per click advertising. My budget is a month for right now. What would be a good price to pay per click to have a decent position on a search engine?