If you have a genuine software CD from older Marathi publishing suites (e.g., "Shivaji Font Pack" or "Desh Marathi Software"), the font is included in the \Fonts folder.
Yes. Select a Unicode Marathi keyboard (e.g., “Marathi - Phonetic”), then choose DVB-TTSurekh in your application font menu. Dvb-ttsurekh Marathi Font Download
Sources consulted (examples of aggregator pages) If you have a genuine software CD from