jacob-bakrie Hello
1/ That article on our demo site has type of Gallery content type, your article seems to be default content type and it will not has that slideshow. You can simply create a new article with 'Gallery' type:
There will be a Gallery
tab for that article where you can put images as you wish and they will appear in the slideshow:
2/ Regarding to the articles on sidebar, you can create module you want and assign it to sidebar-2 position. On our demo site, it's a Articles - Category