First…please make sure you post in the correct forum. You originally posted this in the “Suggestions” forum when it should have gone to the Celestial Reloaded forum. Thanks.
The slider is the Widgetkit plugin that is on the front page and then the other which is located here: http://demo.styledthemes.com/celestial-reloaded/optional-layerslider/ is the LayerSlider plugin (paid plugin though). For anyone who decides to get that one, Celestial Reloaded has custom styling for it, just like for the Widgetkit one. The Maps is the WP Google Maps http://wordpress.org/plugins/wp-google-maps/
About your issue of can’t edit the picture of your slideshow, not sure what you mean? For it showing up on every page, this tutorial will help:
For the Maps:
All the tutorials needed are listed here: https://www.styledthemes.com/celestial-reloaded-setup
I noticed that I did not do a tutorial for the four image boxes like the front age of the demo has, so I will make one today.