If those two points are relatively important to you, I would imagine spending a little time understanding them.
1. You should at least know the basics, how accounts work and how to balance the books. Quarterly and fiscal reports are good to know so you can tell where your business is at. Wikipedia.
2. You will probably need to know about contract and IP law most in the tech business world these days. Wikipedia.
3. Yes, I use quickbooks. It's so easy to use that it has somewhat dumbed down my understanding of accounting that I formally studied last year. Learn accounting first.
Law is a huge deal. Maybe start off at Jurisprudence? :] I have formally and vocationally studied many topics of law (I hope I don't switch from IT/Coder to lawyer >.<) and it's a relatively abstract and complex subject. Basically, learn the basics about contract and IP law, then just work in good faith. The courts like people and businesses that work in good faith.