We want to pick up a rental car in Siena and drop off in Orvieto, keeping the car for a period of 6 days. Hertz has this available for a rate of 250 euros. My question is what additional costs should I expect at time of pickup? Insurance is included but then there are additional insurances to purchase that are optional...do I need these? I don't totally understand all the conditions that I'm reading on the site and I was wondering if someone who has rented recently from Hertz can give me some bottom line total cost info so we aren't unpleasantly surprised when we get to the Hertz desk.