Omega has multiple armor upgrades.
Mass Effect 2 allows you change your non-armor outfit as well as your armor.
no
You have to access the armor in using the Armor tool. If you have the DA armor, you need to slide "Armor Type" bar at the top of the tool until you find the DA armor.
Yes, the first Mass Effect replays carry into Mass Effect 2. The only things that don't carry over are the level ups, weapons, and armor. And that is because the combat system on Mass Effect 2 is completely different than the first.
There are multiple characters that you can romance, but not at the same time as another.
The collector armor can be found in the collectors edition or in the Recons Operation Pack
Yes.
Yes. They're all unique and you cannot use them more than once.
If he died in Mass Effect 1 then he is not in Mass Effect 2. If he survived Mass Effect 1 he shows up in Mass Effect 2 but he can not be killed.
You can only change the facial structure at the beginning of the game, during 'file reconstruction'. After that, go to the equip screen to change armor and weapons.
The effect of mass extinction is extinction, death of a mass