To get trophies, you must buy a game that can earn you trophies. When you do a certain something, you will earn a trophy. You can see what trophies are available by inserting your game and clicking on 'trophies' in the 'game' menu an selecting your game.
No it does not
Yes it does
If by Trophies you mean the PlayStation console trophies, there are none. Halo 3: ODST is only on the Xbox 360.
Yes, you still get trophies if you download the games online.
The Elder Scrolls IV: Oblivion does not have trophies
nope
The trophies earned for Quantum of Solace on PlayStation 3 can be viewed by selecting the trophies option from the game section of the PS3's XMB. From there, select Quantum of Solace to view the trophies you have earned for that game.
Trophies are literally the same as Achievments on the X-Box 360. Although if you go online, other players cannot see your trophies. By the way, the PS3 game with the most PlayStation 3 trophies is definitely Burnout Paradise.
Yes, Resistance 2 supports trophies. A complete list can be found at http://www.ps3trophies.org/game/resistance-2/trophies/
Yes by opening a new account and starting over earning trophies and history
You can get PS3 trophies for Sonic Unleashed.
No it does but you have to do the sync that might come up after you click trophy collection for it to be visible to people who look at it online