1. But you still think murder should be illegal, which is important.
2. If you were to make abortion illegal, the simplest punishment is to revoke the license of any doctor performing the abortion and to fine a woman who has one (at a not ridiculous but still high enough amount to where people are like, "yea, I should really just buy birth control if i don't want to have a baby"). The money paid in fines would go to fund local adoption agencies.
I would also support some kind of mandatory birth control education. I'm actually not a big fan of jail under most circumstances because I think it breeds more crime than it protects the public from.