Kochi dude here- metro is far from the Infopark, and the 'nearest' stops (HMT Junction / Palarivattom) require you to travel through the terrible bad traffic for roughly 10kms, either direciton.Consider as a C class city, single bedroom flat rent will be ~Rs.15-20k, expenses will be in similar range (will not be very near to infopark though).
Try to find areas near Kochi metro for easy travel.
There are IT companies, an influx of people from other states, so you mostly will find variety of food options, but will have to looks out for specific kind of joints.
For shopping, there are enough options including Lulu mall and many others.