1. Yeah the whole page as a poster for one game.
2. Ahhh gotcha yah! Yeah thats okay.
4. Creative commons 0/with credit and public domain are A-Okay. Actual pictures of real life pics of people are okay; as long as creative commons/etc, but pics of other games or consoles less more just for consistency of the "fake" made up nature of it. But you CAN use, more up to you at the end of the day. Its just recommend/encourage to make em up!