Hahaha sorry for you dude this same thing happens with me in the morning and i was so irritated with the noise when i bought 2002 vitz.
Well after an driven my car for 7-8 months i go to khan motors and then he diagnosed the issue that its Ta-pet setting is out and for adjusting it we have to open the engine and i am so sensitive in case of mechanical work so i sell it out just for this reason.
This is the only reason behind for selling out the car while my car was just like zero meter scratch less condition but with heavy heart i ve to sale out my beauty