Driving Advice from UK to Calabria Italy

So, we are planning to head down to our parents holiday villa in Saline Ioniche, Reggio Calabria next summer by car from our UK home in Northampton. (I know its some time off, but looking to get the arrangements booked).Anyway i have driven down many years ago back in the 90's with my parents and need to work out toll costs driving the length of italy so i can figure out the cost of the trip. Having done some research i have planned to drive from Calais to Luxembourg, then on to Mulhouse - Basel - Lucerne and then into Italy.From what i gather i can get away with paying only the Swiss 40euro toll driving this route.So i am not too sure what the toll cost will be driving the length of italy given i havent done this for many years. Will be driving a passat diesel so i know we will be ok on the fuel front.Any advice/info would be greatly appreciated.