Q. Does Toyota Platinum Etios comes automatic transmission gearbox

No unfortunately it doesn't and incase your planning to buy a platinum etios better rush cause they are stopping the whole production line of its series the etios liva hatchback is a great option if you are looking for a mid-size hatch or else the sedan automatic only for the yaris

Toyota Etios has not available in automatic transmission it is available only in manual transmission.

No, only a 5 speed manual