You can't. There's an upgrade which allows you to get rid of the scars on your face, but the rest of it stays like it is. At least without the use of tools (if there are any).
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.
Mass Effect 2 allows you change your non-armor outfit as well as your armor.
No but she takes off her helmet if you do the romance scene with her
If by not importing correctly you mean that your Shepard's face is not what it was from Mass Effect and Mass Effect 2? This issue is encountered with people who attempt to import a Shepard that they have played through both of the first games with. The reason for this error is that because Mass Effect did not use the same coding system that Mass Effect 2 & 3 use, the game is unable to generate an accurate render of the imported Shepard's face, often resulting in a Shepard of completely different appearance.
Mass Effect 2 is a 15.
No, Mass Effect 2 has a completely different weapon system.
mass effect 2 will be
The SSV Normandy in Mass Effect The Normandy SR-2 in Mass Effect 2 & 3
Mass Effect 2 is rated M for mature by the ESRB.
Mass Effect 2 is rated M for mature by the ESRB.
No mass effect 2 will only be on xbox 360 and PC
Mass is a property almost all matter has. It does not change from place to place, it is always constant. It is measured in Kg. Gravity is the effect mass has on other mass. It is the effect 2 (or more) bodies of mass drawn to each other. Gravity is measured in m/(s^2), this is a unit of acceleration.