We're staying in Rome for a few days and will be renting a car on Sunday morning before leaving Rome to explore Tuscany. I currently have a rental booked through AutoEurope from the Termini station. We're staying on Via della Vetrona near Piazza Navona. I'm wondering if there is a rental car place that would be within walking distance from our apartment that is open on Sunday. If so, are we better off picking up our rental there or leaving from Termini for the ease of getting out of the city as this will be our first time driving in Italy. I assume a cab from Navona to Termini would not be terribly costly?
Thanks in advance.