Classified Modification Wordpress

We have 2 wordpress sites that we need combined. We have all the files, and it should be a straight forward job. The main site we have is http://worldwideclassified.co/ <--- this is the template we are using: and we want to implement the following site attributes ie: the classified function: It allows clients to create accounts, place classified adds...http://coupondeal4u.com/ <---this is the site that has the classified function, want to use this theme classified function for the posts on the main site above.

NOTE: navigation buttons on left should resemble these:

http://www.usajobs.gov/JobSearch/Search/GetRefineControlResults?Keyword=&Location=raleigh%2C+North+Carolina&SelectedRadiusOption=20&search=Search%21