Targeted ads financial prevision

I am launching an application for people to people connections. The theme is that through an initial test the user will rate certain activities and depending on their tastes we want to show them relevant advertising (if they have put that they like tennis, we will show them tennis rackets).

What I would need from you is to make a call, show you where I want to place the ads, explain the concept of targeted ads (we will have our own data to target the ads) and you as an ad specialist predict how much would I generate with cost per click, cost per thousand impressions...etc