rudysfire,
There is the correct way and there is the easy way. The correct way is to go into the PHP of the theme, find the offending elements and delete them. The easy way is to use the CSS to set the “visibility:hidden; margin:0px; padding 0px; height:0px;”. I have used both and had success but the CSS way could cause other issues.
Another thought is that the avatar image, thought cloud and other author based info is usually associated with comments on the blog. If you are not allowing comments then you can shut that function off on a page per page basis in the dashboard.
To shut off the comments on a page go to the list of all pages and select Quick Edit under the name of the page with the offending graphics. Uncheck the “AllowComments” box and update the page. Once the ability to add comments is deactivated the need for the author avatar and metadata is gone and in most themes will automatically disappear.
Good luck,
Brett