ABS and Airbags are not available for the Tata Nano which is made for India. It is a 1 lakh car. So they have made the car according to it. But the Europian version of Nano posses some of the safety systems including ABS and Airbags. This is because the Europian laws are strict and according to that law, these safety systems are compulsary.
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.