Honda Civic is available only with petrol engine option... its mileage in city is around 10kmpl while on highway it gives 14kmpl.... Honda Civic Hybrid is currently not available in India..... for more detail about this car along with its price in particular city you may visit the above link..... Honda Civic
Honda recently discontinued the Civic in India, however you can buy a used Civic. You can visit our, used car section, where you can find good deals- http://www.cardekho.com/used-honda-civic+cars
Well, it is quite early to reach on any conclusion, whether the service network you visited provided you the correct information or not. We would suggest you to search for another service station, if it also gives you the similar advice then it would be better to repair your car. Their could be multiple reasons behind the noise coming out from your car's engine such as badly aligned camshift belt, faulty front brakes pad, and not so proper felt belt.