Web Scraping/grabbing/downloading

I need, in just ONE site, 0. LOGIN 1. reproduce various clicks, 2. capture a specific very simple content of one page 3. can select one of the visible row of that page and run/click it (it's possible also to run one after one, all the rows of that page) without to show anything) 4. navigate through all the resulting pages, and for each of these pages to select every object visible and, 5. page through page, to download files that can be MPG, MP3, JPG. That's all