your handbrake is shit, but it will still apply some resistance. The handbrake works on the back wheels and camrys are FWD so it will move a bit ye.
If you want to rev it put it in neutral, but why?
they should have built two iron ore smelters, one on the east coast and one on the west, with frieght rail lines connecting them to the mines and ports, built/upgraded ports (there is a massive bottleneck on exports), etc.
maybe for like the first few 100 km but not months, tolerances on engines nowadays are very good and it certainly isn't going to get any tighter after being run, if anything "looser" as friction wears parts down.
just eat healthy that's about it, not much you can do. Washing it everyday will not make it grow faster and will almost certainly strip it of natural oils.