Automobile

So a friend and I are planning on flying into Munich on March 27th and flying out on April 5th. During that time we’d like to go to Florence and possibly Rome. I am having a hard time figuring out what is the most cost effective route to take transportation wise. Plane tickets from Germany to Italy aren’t too bad. It seems a waste to get a EuroPass, renting a car isn’t too bad either but from what I’ve read it’s a pain to deal with parking and map reading, road rules, etc. So…any help at all would be greatly appreciated!

Thanks!