yaar vitz 2005, aap ki gari mein har dusrey roz koi problem hota hai. Are you sure you bought a car with genuine mileage and condition.
And regarding the noise, its quite normal for 1000cc vitz model.Dont worry nothing is wrong.Vitz new shape model in 1000cc version does make a little bit more noise than 1300cc vitz.The reason is that 1000cc vitz is not 3 cylinder and the older one was 4 cylinder. And all the other cars you mentioned like toyota and honda have 4 cylinders or more i think.
Hope this answers your qs.