6 - No content displaying though content is there
This can be of due to many reasons. Check one of these,


Go to configuration/system/site information, Make sure, you have correct number of posts and front page. [Number of posts on front page ]
When you add content, then, make sure, you click on publishing option and click on 'published' checkbox. You can check the content is published or not, by making a menu link of it.
If these are okay, then, please check by changing the theme, may be your theme page is broken or something. Go to appearance and select new theme.


Make sure, you flush your system, cache and try.