Your thermostat valve has been removed by a local bas for sure. Better get one installed for better performance and low wear and tear in cold weather.Probably you may get one from the Agent or tech motors at panchi.
Dear Bro, Don't go for TOA paint ,It will peel off with the high temp. Either you go for heat ressistant paint as Ripper told or chrome plating as hardana advised.
Heat resis. paint is bit expensive and available at marine paint shops .
Better you go for swift because I experienced the rattling noise of passo's steering rack and i hate it. I have driven a swift and its very smooth. Fuel wise passo is better. It does 10-11 km/Lt for short distance.(1300 cc )
My wife uses a Demio daily and it does 10km/lt for short distance trvelling. Never checked long distance. She bought it for 25.5 lacks in last July(YOM 2007). So far no issue, Fairly good pulling power and nice shape. It is comming with two types of gear boxes. CVT one does more on fuel.
Those days Tax for 3 year old car was around 13 lacks.
agent is car mart but they don't import Demios to my knowledge but spare parts are available at panchi.