I went for these rims on my city. i.e 5 spoke silvers in 15". these are the rims in this sze that can give the best possible look to this car according to its aerodynamic shape. My colour was habanero red pearl.
What is ur colour code? and in what inches size are you interested.?
http://motorbeam.com/wp-content/uploads/2008/09/honda-city-india-details.jpg
hmmm, first thing is to avoid keeping such things in the boot at all... LOL 
now that u have to,an extra carpet is a bad solution, trust me. U can always take out the carpet on a weekly basis and wash it up in ur home. don't use any rough and hard brush for the purpose.
one more thing is that get some picnic baskets and use those for bringing in groceries. most of the particulars will fit in them. and they won't let them give a bad feel to the carpet in any way. 
I hope this helps...
technically, the new city has smaller interior cabin but a bigger boot space. idsi has small trunk as compared to the new one.
I have kept three full size double barrel shot guns in the new city but those won't fit in idsi... 
hmmm, according to the isb market, its fair price should be around 930k-980k. Depends upon the owner totally. If he demands 1040k for such a car, trust me he can get it. So, if somebody offers u such a car in 940k, do get it immediately.
But, before paying, make urself very damn sure that the car is genuinely 52k driven cz I have an idsi 199k driven and U won't even guess such a mileage by looking at its condition.
what I mean is, driving the car so much and then keeping its looks marvelous like "never taken out of the garage" or "army officer driven" or "lady doctor owned" isn't pretty much difficult at all. 
One can end up in a bad situation by thinking the car is 50k driven when it actually is over 100 something and doesn't happen to check its periodic maintenance.
I hope it can be of some help to u...
Regards... :)