oh jesus ... dont listen to anyones posts on the matter, just look it up in this manual:
www.**********s.com/camry/
which would tell you that the 3 strut tower nuts on each side should be torqued to
59 ft-lbs for the fronts (pg 52 of SA.pdf) and 29 ft-lbs for the rear (pg 82 of SA.pdf)
and the 4 nuts around the spark plug holes to secure the valve cover should be torqued to
17 ft-lbs (pg 15 of eg1.pdf) -- they are 30mm nuts, so i bought a 30mm socket (which is huge and sometimes hard to find) ... but 17 ft-lbs is within hand-tightening range so you can just use pliers or something if need be

yea, that info is for gen 3's but i dont think those aspects of the engine bay were changed for the gen 4s