Few things from my side.
Alloys -- Go for silver colored multi spoke max 8 spokes or 5 spokes alloys.
Tire Size -- stock size is 155/80 R13, best upgrade is 175/70 R13. Anything more will kill the little i10. Go for Turanza series if bridgestone, yokohoma a drives or michelin XM1+ or XM2. However there is a news that current XM1+ is not that good.
I own i10 auto asta. I am also considering plati alloys, however will wait for more 5k kms.
K&N or green cotton, iridium spark plugs and FFE would be sufficient. Also do let me know your fuel efficiency.