If you want a hybrid, for an Axio Hybrid that will give an average of 21 km if its 2018 model or plus.
A fresh prius would be expensive.
A 2006 to 2012 axio non hybrid will give u average of 13 to 17 with AC and will cost you 30 to 32 lacs.
A 2005 to 2007 premio will cost u 30 to 35 lacs, it will give an avg of 11.8 to 15 km with ac.
Apart from it you can go for a fresh 2019 Aqua but do check the auction sheet.