1996,Car is idling at high rpm’s and when the days are hot the car cranks but doesn’t turn on and also exhaust is smoking when i rev it

So my car idles high in park & in hot days the car won't wanna turn on it cranks and it might turn on after trying to turn it on but then dies unless i give it gas, only in hot days also my car has been burning oil but no smoke has came from the exhaust till i added some oil and all of the sudden the car start smoking up from the exhaust when i drive or rev it. what could be the issue? it drives fine oil is a bit dark when i checked it tho and the car seems to drive normal.

My car has 126864 miles.
My car has an automatic transmission.