hey guys I own 94 Camry with 160000 miles

. lately its blowing blue and white smoke in the morning

, after it worm up and I start driving it it seems like I'm pulling a heavy load for few seconds and blow more smoke then it drives good. it also does the same thing when I leave it ideal like in a traffic light or going to the gas station to get something.
the things that I notice:
#oil in Throttle Body
#last night the vacuem is spraes oil

#when I leave my foot on the gas and the car is on N or P it does not pass 4.5 RPM
I have this feeling it's 16 valve seals (it's I4) but why is there oil in the Throttle Body and is it possible to do it my self and with out taking the head of or the engine out the car cuse it will cost a lot of $$$ to do it in a shop and what kind of tools I need some one plz tell me what to do

thank you for reading