To get from the train station in Melun to the château you can take the shuttle bus or you can call Matias Enrico (from Portugal) at 06 07 94 07 21. He works for Radio Taxi Melunais… Lynn sent me this information: “When I told him to pick us up at a certain time (from the Château), he was there; he was charming and spoke English.” (He does take some time off in August for holiday.)
The shuttle bus runs between April and November on Saturdays, Sundays and holidays. For all of the time schedules and candlelight schedules, refer to the Vaux le Vicomte website “Prepare your visit>Access” page. The train from Gare de Lyon to Melun takes 25 minutes.