Go to Settings -> Discussion -> and look for Default article settings and disable "Allow people to post comments on new articles". Thats it
You can change the post excerpt from AMY Settings -> Homepage Slider -> Slider tile excerpt
A common issue that can occur with users new to installing WordPress themes is a “Broken theme and/or stylesheets missing” error message being displayed when trying to upload or activate the theme. This error message does not mean that the theme you have purchased is broken, it simply means it has been uploaded incorrectly. Luckily, there is a very easy fix.
You can disable comments trough here