Content Management for Website

I already have a website template, but need a CMS to handle the following: 1. Client sign-on I need a control panel that allows me to activate/deactivate user IDs and passwords. When the client signs in, I want him to get to a page where he can: a. Upload files (I need him to be able to upload multiple files) b. Enter instructions c. Enter a deadline (a date) d. Click on Submit (when he clicks on submit, I want a., b. and c. to be emailed to me) e. Lost password (if the client forgets his password, I want the website to email it to him) 2. Quote Page (something similar to this: [login to view URL]) When the client clicks on submit, I want the information to be emailed to me) 3. Search When the client clicks on the Search button, I want information from my website to be displayed. 4. Content management and file-management tools