Before you start

Can any one help me understand what all technologies are used while developing site similar to
http://www.designzillas.com/
I know its drupal but not sure how to build something like this .

How can I analyze technology used while developing the site?
Is there a specific theme used ? or its a manual html+css developed over Drupal core.
Its responsive too. How do i know whether its built on zen or omega or some other framework?

Any clue will be highly appreciated.

Situation:
- Subscription site (annual subscriptions)
- User gets access to graphs showing their performance over time (time series data)
- Graphs need to be pretty, modern
- Site needs to be usable on mobile handsets
- Back-end processes receive data and add them to a common database every night

Use cases:
- User subscribes, gets instant access to performance over 12 months prior, able to view graphs
- User checks latest graphs from iPhone
- User gets email indicating there is a new performance measure on the site

I am a fan of the book, Drupal, The Guide to Planning and Building Web Sites, by Cindy McCourt. But I don't understand content strategy very well as I am not a professional. I am a newbie trying to figure out how to build my first site which is a bit complex, and this explains so much about planning. I have read and re-read some sections over and over and over. They are full of highlights and penciled notes etc. I have learned a lot about planning sites with Drupal from it.

I'm making my first steps with Drupal and my boss wants me to offer the following functionality. Since I just began to work throgh an introduction book for Drupal I'm not even sure if Drupal would be a fit for the demanded features. Please give me some adwise if that is reasonably feasable with Drupal 7.x and what tools from the Drupal collection I should consider for getting it:

I only need to be able to add news, pictures (these two need to be easy to upload for a normal user) and a nice looking way to display "people" (info like birthdays and things).

Images doesn't display on image_block and view blocks. Image holders are there. The link to the site is www.talway.org. When inspect the code, the path to the image is correct. Please help me