Yes, there are Car Hire/Rental services locally available around Coonoor and Ooty. To name a few - Zamzam Taxi, Mab Tours and Travels, Dhanush Subhash cars and so on. The charges vary from INR 20 - I (Read More)NR 60 per hour or more based on the car preference. It excludes toll tax, permit and petrol which are considered as extra charges.
I would suggest you to pick a destination with moderate or Cold weather. The temperature in Pondicherry could go as high as 32 degrees in March. There are places like Auroville which involves a lot o (Read More)f walking. Also to enjoy the local cuisines and artefacts of Pondicherry you need to take a stroll through the streets. So if you're looking for sight-seeing, this wouldn't be the preferable time to visit.