Hi! In order to solve the padding problem, you’ll need to go to your Custom CSS Section in your Theme Options Panel and enter the following code:
#rev_slider_1_1_wrapper {height: 450px !important;}
From que link you’ve send us I can only see that you have not uploaded images other that the background image. If you want instructions on the setting up of slider, you can chex the Slider Section of the Agile Documentation.
Cheers! Let us know if you have any other queries!