Market Research Questions on the Current market?

Hello All;

I'm trying to do a little bit of market research on the 3D gaming industry.
I'm making a few games with torque.

here are my questions. If there is some rock solid source out there that someone could point to that would be great - sort of like solid proof - but if you don't have the link please answer the question any way. will be glad to hear?

QUESTION #1:
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What is the percentage market share of PC Games, Xbox and Playstation games?

QUESTION #2:
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About how many specific numbers of these products are selling (PC Games, Xbox games, Playstation)? for example 2mil, 5 mil , 7 mil ?
And who tracks that information ?

QUESTION #3:
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In terms of genre - what kind of games are leading the pack?
I was just talking to a 9th grader, he said action games and first person shooters sell way more than exploration and role playing games. Does anyone have any official numbers on that?

QUESTION #4:
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Who are the tastemakers in games?
Where are the PC gamers going to get their info about the best games to get?
Does in store displays have a dominant effect on their decision or is it magazines or friends and referrals?

QUESTION #5:
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What is the percent breakdowns of age groups buying games?
I understand that the dominant group is males between 18-35.

Thanks in Advance

See you later

Stephen