Nearest TGV railway station: ‘Nice-ville’ http://www.voyages-sncf.com/
Then
TER connecting line n°4 Mandelieu – Vintimille
timetable (only in French) : https://www.ter.sncf.com/sud-provence-alpes-cote-d-azur/se-deplacer/fiches-horaires
Stop at Villefranche station