Help with settings for users

I am trying to set up a real estate rental site. I have posts of listings on the home page (with no excerpt) and a slideshow with featured listings that I would like to show to free visitors but I do not want them to be able to click on the posts and go to the listing page. All of the other listings are for paid subscribers. I have not been able to achieve this yet.

I also have a question about setting up the back end of the site for agents who will need to create a profile on my agent page and also post a new listing? I have no idea how this would flow after they sign up? or how to give them access to just these two items?

Can you help me? Thanks-Kathy