As per my experience and knowledge:
New Battery Pack Cost Rs.300,000-400,000/- they doesn't come with warrant as there is no Official Toyota 3S dealership for Hybrid Cars.
Used Battery pack normally cost Rs.85,000-120,000/- again no warranty just 1 week check in warranty.
High mileage Hybrid cars are normally imported.
If you still interested in Hybrid cars , always look for 50,000-70,000km imported hybrid cars.
We don't have certified Technician for Hybrids, its like if you repair your hybrid battery pack if it work then it will works for long time and if it didn't then it'll be nightmare.
Therefore, look for low mileage hybrid cars. If hybrid cars are not in your range look for other options.