If I have one campaign with Similiar ad groups and similiar keywords in those ad groups do I need to worry about the different ad word groups or different key words in my different ad groups competing with one anouther and running up my cost per click?
Also so do I need to worry about the same internet customer clicking on multiple different adds all belong io me and running up charges?
Google finds the best matching keyword / ad in your account, and then the winners run in the auction against other advertisers. Having multiple keywords that match will not affect your click costs.
Only one of your ads will be shown in any one search result. If the same person clicks on it multiple times, usually you will just be charged once, but if they click on the headline and a sitelink you can be charged twice.