Tata Nano is basically a 4 seater car and there is an ample space for 4 adults, but if you want to accommodate 5 passengers, it will be congested. The car also comes with an adequate boot space of 125 litres at front.
New Tata Nano with EasyShift is available at Rs. 2 lac (Ex-showroom, Delhi), and the final cost depends on the valuation of your car. So, first get the valuation of your car from authorized Tata dealer, so he can give you a final quote for the new car.