Most of us don't want to start the engine ever, nevermind remotely. Why on earth would you want to? Only thing I can imagine is that you have a low spec model without electric heating and want to pre-heat/defrost?
A "secret" mechanic's hack was described some years ago to start the engine when doing maintenance but you would have to be in the car to sequence it. In most countries, I would expect the ability to start an engine "remotely" would be illegal for safety reasons.