hey Jyotib
welcome to TAI :)
wrt your queries
1. AC in extreme heat ( say summers noon onwards ) still requires a lot to be desired. takes time to cool up. Predominantly being an all glass hatch, it does'nt help much either. But yes in evenings the ac becomes much more effective and at times you need to reduce the thermostat. Mine are always set at maximum. The positive side of being all glass is that the visibility is great and you get a specious feeling (not that the car is small in any way). from outside you may get the feeling but from inside its a different ball game together.
there is an option to install reflective / anti glare transparent films if you have to travel more frequently in afternoons. i read about a particular grade somewhere but they do not come cheap. will post about it later.
2. in bumper to bumper i get around 10 to 13 and on highways around 14 to 18 and even 20. it depends more on your driving style. I cant get myself to stick to that eco light at least in delhi roads.
3. teflon coating is a waste, if you are in a habit of washing the car daily etc, it will be washed away in one cleaning. these H! guys use a normal wax which is given a fancy name like teflon.
i own a red and lets be honest , any car will get scratched knowing how delhi traffic is. the red not being a metallic color helps since u can get touch ups easily. also scratches show up as black and if they are deep as silver. generally with scratches, its the other cars paint which sticks to your car depending on whose mistake it is.
rubbing compound helps and if you are buying a white car, scratches will be highlighted more. cars do get dirty and dirt will show more on white than any other color.
if you do not like red, go for the urban titanium. i would not suggest anyone to buy white.