Can I have my lost phone, phone calls come to a different number like call forwarding?

Yes, and no. If your carrier has an option from within their online portal that you use to manage your account, then yes. Otherwise it's no. One of my carriers has an option from within their online portal that allows me to forward any line to another number. So if I forget my phone at home, lose it, etc., I can log into my account profile, and forward that particular lines calls to another number. Then when I'm done I log back into the portal and cancel it.

Yes that is possible if your carrier have remote call forwarding on their web page under my account->call management.

If your carrier don't have that option then just contact your service provider and ask for new sim insert it in any device and forward your call to any number as you need

What type of car should I buy?

You should buy a Prius.I say this because you posted something which infers that you have zero knowledge about cars and don't really care, just like most Prius drivers.

Does India have ecosystem to support Tesla cars?

Tesla will build the charging infrastructure when they begin selling in India. In every country they sold their cars, the supercharger network was installed as well. All that govt of India should do is to provide more incentives for people to buy electric vehicles.