Re: what types of ad that will need to appear in my site
You have multiple options to shoose from in regard to your ad format. See the help-page linked-to below:
*** Choose an ad format
If you're doing AdWords there's no point in getting your own ads to show on your own website, you can do that without paying Google. They do so on the search results page (Search campaign) or on 3rd party websites (Display campaign).
In case you want 3rd party Google ads to show on your website you are at the wrong forum. You need to join the Google AdSense Program. Info: http://productforums.google.com/forum/#!forum/adsense