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1 ) Visual Composer page builder works with only newly created pages and not with the dummy pages that are created using the “Import Option”.
As of now we have only updated the theme to be compatible with the Visual Composer plugin. So, if you want to use it you have to rebuild the home page using “Visual Composer Builder “. There you have to add a shortcode manually.
We will try to add the theme with visual composer compatible in our future versions.
2 ) Make sure that you have imported our dummy sliders. If not kindly import the slider and check out the issue. Slider folders are come along with our theme package please have a look.