Rim prices vary from Rs. 8-20000+. it all depends on the brand, look and size. on the average, good ones cost around Rs. 15000/set (pair of four)
Brand new cars here come with tires of the "General" brand which start bubbling after 17-20000km. it is therefore most adviseable to get them replaced as soon as you get the car for a better resale value.
Michellin cost Rs. 4500/tire. Dunlop and Yokohama, around Rs. 2800/tire. this is the average price m telling of a 185/70/13 here in Isb. you have not mentioned which city you'll be staying at to help members from there guide you better.
exchange of just the rims might give you a discount of Rs. 1500 to the max. a combination of the tires AND the rims would go deeper, much deeper to as much as Rs. 8000 as well.