You can order Toyota brand 0W-20 synthetic oil from any Toyota dealer. I did so at Bob Rohrman Toyota in West Lafayette, Indiana, while visiting my brother earlier this year. It costs <$5 per quart by the case.

McGyver — The valves of the TCH are never all held open. The VVTi valve mechanism can't do this. To start, the ICE is simply turned over by MG1 with all the valves operating normally. When spinning at 1000 rpm (i.e., at idle speed), the fuel and spark are then turned on. If you think about it, you'll see that very little effort is actually needed to spin the ICE under these conditions, since while one piston is compressing the air in its cylinder, the air in another cylinder is simultaneously expanding and pushing against its piston. These two forces act in opposition, and largely cancel out.

Stan