Two days
You need to specify where in France to where in Italy. France and Italy border each other. So the simple answer is zero distance.
how long does it take to get train from london to runcorn
a very long time
Presumably you mean London, Ontario.
How long by train and train fare from nice, france to cinque terra italy
search www.trenitalia.com
About 1 hour.
40 years!
About 3 hours
A direct train takes about 4 hours.
The train ride from London to Paris typically takes around 2 hours and 15 minutes.
by train it is at least 24 hours, driving would take longer cause cars are slower and the roads are less direct.