Call the City Clerk's office at City Hall in New Rochelle to find out parking lot availability- 914 654-2000
Here is a link to the Parking Form -
http://www.newrochelleny.com/09parking%20app.pdf
I commuted into NYC from the north end for years. You have two Metro-North train lines available, the Harlem Line and the New Haven Line. Both go to Grand Central in NYC.
I recommend the New Rochelle train station. Even though the Crestwood train station on the Harlem line is closer to the north end of New Rochelle, parking is impossible in Crestwood. The Scarsdale train station is no closer than the New Rochelle train station and there are more parking lots available in New Rochelle. Good luck.
Metro-North
MNR Connecting Service