The Lilydale train line services Mooroolbark and there are also buses that service the area.
Lived in Templestowe for many years, the one thing that I don't miss is the lack of train services. If you don't have a car then the buses are a serious walk to catch or a walk to Doncaster Road. Well, that was my experience! May have changed now. Mooroolbark is the most convenient suburb to live in. But it's mainly for Australians, English, Scott's, Greeks, and some Italians. We all get along.
Second last stop on the Lilydale train line (Mooroolbark station) to and from the city via Ringwood, Box Hill, Camberwell (Alamein line couples here), Glenferrie, Richmond to Flinders Street, through the City Loop either before or after Flinders St.
Buses to most local hubs (Chirnside park, Croydon, Ringwood, Lilydale etc.).
Trams link at Box Hill, Melbourne and surrounding suburbs.
No shortage of transport.
Telebus, Railway and buses.