If you want to, and you're into Video Games. Try reading a few online reviews about it.
This is up to you. But, my opinion is that you should definitely play ME1 first. You get a better feel on the Mass Effect Universe, and you will be more attached to the game, and will enjoy ME2 a lot more. Mass Effect 1 is a great game, as is Mass Effect 2, but if you have the time and the money, play ME1 first.
Yes.
Mass Effect and Mass Effect 2 are both single player. There are no multiplayer modes
Definitley mass effect 2
No, the player can only play as a Human in Mass Effect 2. The player can, however, date non-humans.
Depends on the game type you like. I would personally get Mass effect 2
If you don't import a save game from Mass Effect, you will automatically choose the character of the opposite gender to survive. If you play Mass Effect first, though, you can choose if you want Ashley or Kaidan to survive. So to play Mass Effect 2 as a female and with Ashley alive, you would have to play Mass Effect and let Kaidan die on Virmire.
You won't be able to import your save game from ME1.
It doesn't but it does have downloadable content.
No. That's a single player game.
mass effect 2
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.