No, abortion is murder. The death penalty is killing. The commandment proscribes murder, not killing. The OT called for capital punishment for quite a few things, including dishonoring one's father and mother. You can make social arguments for and against capital punishment; you can make legal arguments about it, but it's tough to pull one out of the Bible on it.
Yes, it is, but I am still against killing someone and the eye for the eye on that one. They get more punishment sitting in prison the rest of their lives.