I have 2000 xterra started running hot,all the sudden noticed oil leak out of passanger side valve cover put lucas oil stop leak in it..made it 6 miles lost all power blowing white smoke tail pipe hasnt been driveable since it cranks if u jump start it but no power at all barely idles if at all

SOURCE: white smoke?

It's just condensation. Water will also drip from the pipe.

The colder it is, the worse the 'smoke' will be. I was in Vernal, Utah earlier this week, drove through -18*F weather, my truck never quit blowing white smoke.

And NO IT IS NOT YOUR HEADGASKET

SOURCE: car is hard to start, keeps stalling, white smoke coming out of tail pipe

It sounds to me like you have a head gasket leaking. See if you can get a gauge and check each cylinder. Are you using alot of anti freeze?

SOURCE: 2004 ford diesel blows white smoke. and drops of

look for block return lines- air leak in suction lines -block fuel line or filter - defective injection pump -inoperative glow plugs.

SOURCE: 1994 Lexus ES300 large cloud of smoke.

Valve stem seals can cause this problem, but normally only when first started. Oil in the rocker cover seaps through the oil seals into the cylinders and is burnt up on start up.
Try a "STOP A LEAK" additive and it may reduce the oil consumption and smoke.
I found some on e-bay and it worked on my tired old escort. It even stopped the rattling tappets.

SOURCE: Ticking on '05 Chevy Equinox

THE TICKING NOISE IS VALVE LIFTERS.MOST OF THE TIME WHEN ENGINE OIL GETS DIRTY NEEDS OIL CHANGE.DIRT GETS IN LIFTERS THEN CAUSES THEM TO BE NOISEY.IF LIFTERS STAY NOISEY ALL THE TIME.THEY OR WORN AND NEED REPLACING.ITS NORMAL FOR CAR TO SMOKE A LITTLE WHITE SMOKE IN MORNING ON START UP.LONG AS IT DONT KEEP SMOKING IF SO.YOU HAVE HEAD GASKET LEAKING.