Code Features into layout

I want to be able to add new items to the site when I want to so the site would have to have a backend. I have 3 items that I want to add to my site to start out with and those are Pictures, Videos, and Jokes but I want to be able to add maybe in the future games etc so I want that to be easily done. Features that I want to add to the site. 1. I want the users to interact with each other as much as possible so that is why I want to add a Comment Box to the site under each item they selected like shown in the layout. 2. Able to allow users to upload any Media file to a folder within the site from a link on the bottom of the site 3. After an admin uploads a new Item it will show up on the front page of the site 4. Easily Change the advertisements on the site and have the banner rotate 5. be able to Check a box in the backend of the site to tell the script to not put the picture on the front page and to add (Nudity) next to the link in the list I want to be able to choose from the two layouts that I have created when I want to add a new section to the site. This would happen if I would want to add a new section of pictures under the Wired Pictures Category, or just want to add a new section under the Other Stuff category. Now about the bottom of with the Privacy Policy and the Terms and Conditions will I be able to edit those when ever I want because I don’t know if would have to edit the content in those links. Also about the Summit Files and Contact Us pages, the contact us page is self explanatory I will pick an email address to send all of my messages later and about the Summit Files link I like the lay out that [login to view URL] uses ([login to view URL]) so there is an example of the summit files page. O and about the Comment Box here is an example of the type of comment box I want to use ([login to view URL] ) at the bottom of the page. PLEASE SERIOUS BIDDERS AND I WILL HOLD YOU TO YOUR TIME FRAME; I REALLY DON’T WANT IT TO TAKE LONGER THEN A WEEK TO COMPLETE. I WILL SEND THE PEOPLE THAT ARE INTERESTED THE LINK TO MY SITE LAYOUT WHEN THEY POST A MESSAGE TO ME. REMEMBER THAT I ONLY WANT YOU TO CODE THE FEATURES IN TO MY LAYOUT