Editing CSS on Classified Page

Hey guys. Spent some time setting up Classifieds. User it as a user PR submission app. I had to make the post type a catagory to include it in my menu. I'd like to edit the CSS on the listing page so it removes the table and aligns the image. Would also like to be able to edit the blog CSS to make the post more stylish and fit with the rest of our blog. Let me know how this is possible. Attaching screenshots.

PS: I spent some time browsing support and found that you instructed to use custom CSS with a code, I have used that to no effect.

My theme is Virtue premium.