Hi Anurag The Honda Civic model is available in three variants (SMT, VMT and VAT) in which two come equipped with manual transmission and one is coming with automatic transmission. The manual transmission version offers the mileage in of 10 kmpl in city areas and up to 15 kmpl on highways. On the other hand, the automatic transmission offers the mileage of 13 kmpl on highways and around 8 kmpl in cities. Thanks
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.