Can I get rid of "cost" field or it will harm something?
If it is ok, is the right way to do it is by deleting it in CustomPress - Custom Fields?
I would also like to remove featured image option. How can I do that (both from add new classified page and from single classified page)? Should I do it with css?
I also don't want to display expiration date and duration in classifies single page. (I want the expiration date to work, means the classified won't be displayed after expiration date. I only don't want do display it in front site, to visitors). What is the best way to do it?