Adding Tables and User Registration

Hi, I am looking for some advice. I have created a site (www.ambassadorforphilanthropy.com) using DreamWeaver to make static pages. We are now formulating the next version of the site, and I have already succesfully duplicated the site in WP on a testing server. However, we are looking to add memberships, where someone pays a fee and gets to create their own page and add their own videos, pictures, etc. However, we do not want them to edit the page in the normal sense – they will fill out forms (which will then be stored in a table) and their page will be filed in with the data they provided, but in the format we have set up. What plugins would be appropriate to do what we want, or should I just write custom PHP code to achieve this?

We would also need secure passwords, and the videos (hosted on Youtube) would be linked through a table that links videos to a particular page by the user id of the member.