Classifieds Plugin not fitting into my theme well

I did comment on one thread that I noticed the page and sidebar styling are not as cool as the screenshots that attracted me to the plugin. (https://premium.wpmudev.org/forums/topic/styling-the-classifieds-page-and-sidebar#post-170547)

It's not fitting into my theme well, but I'm optimistic with your support, it will.

How do I call my theme's sidebar to the plugin's pages? How can I list latest classifieds on the sidebar? When I click on the categories I have created, I see this: (Classifieds / classifieds_categories / job-available). How can I fix it? How can I display categories on the sidebar?

Support's appreciated. Thanks!