Build a Website

hi i am using wordpress to build a website and i need help with some asspects with my website [login to view URL] thing i uploaded i want my website to have something similler to that when someone post and uploads stuff [login to view URL] help with creating user and profiles and groups trusted can only upload [login to view URL] help with the upload and download bar a button have certien people upload stuff to my people and only have user download and read it 3. i need an index alpbetical index when people post by title like the imiage below need to be a-z 0-9 4.i need groups and forums and certien trusted groups can only upload for other to download [login to view URL] profiles