kingsize theme problems

Downloaded kingsize theme and imported the express setup file but I have the whole galleries full and I have stuff downloaded on my site that should not be there, I’m following a tutorial and it just wont line up because the files I downloaded are different. Please help I have already deleted the theme and re installed and I do not think that was the problem I think the problem is in the express setup that was imported but I can not delete that and start over. On the tutorial the Kingsize WP is on the dashboard but it is not on mine. Any help or suggestions are very appreciated.. I have built other sites using the same person’s tutorials just a different theme and different type business and had no problems at all.Just a newbie