You have to park your car at the car park just outside the town, and take a toy train that connects Nerul to Matheran. The train works great if your hotel is near the train station. In case your arrival time doesn’t match the train schedule or your hotel is farther away from the train station, you can opt for the hand pulled / horse carts to get to your hotel. If you don’t have a lot of luggage and would prefer to walk instead, that’s an option too. You can walk by the railway track, slightly off the main road, and reach the train station in around an hour. Well, the people there will tell you it's a 20-30 minutes walk. So, make whatever you want of it, but let me say upfront, I warned you. If you have a toddler, s/he will get tired and become an additional piece of luggage. Account for that. I won’t recommend the mode of transport for you, because there isn’t a right answer here. Just… be strong, buddy. No, I mean it literally - physically strong. Emotional strength will be an advantage too, especially when you are dealing with the monkeys who will spring up on you, when you least expect them to. The town has a large monkey population. I am not scared of them. You are scared of them.