Yes
You can anything you put your mind to. How old is it when a child starts talking? I would say below that 4 year make so if they can do it you can also learn.
To a good degree but, the grammar is extremely difficult and it'll take some time to get used to.
Try to learn with Rosetta Stone!
Sure, but reaching fluency is supposed to take you at least 1100 hours of class..
you have to have the ability to think Russian, they speak backwards in a way.
no