Need Advice about Engine !!!!!!!!

[Bony_ahmed]

Mine is a 07 yaris with 1.3 2nzfe. Recently engine is making intense blow by, even i got oil in the intake manifold. What should i do ? the car idles poorly, i have cleaned throttle body, maf sensor, changed spark plugs, air filter. When i put in Drive the car shakes like hell and sometimes stalls. i dont get bad mileage or drop in power, the car feels a bit off power but its very slight. I got 124k km on the odo. Local mechanics are saying i should swap for 1nzfe, What should i do....im getting confused. oh btw the engine burns oil, like i have to put 250ml every 1k km. my concerns are

Will a valve timing fix will solve it??

do i really need an engine swap ??

or is it related to any vaccum issues ?