Wallman I would suggest that beings the vehicle is new that you go by
what the manufacturer recommends. That being said I just came across
this post on another forum;

Straight from a Toyota rep, there is NO such thing as a "break-in"
oil, but if you want to do something helpful change the oil in your
brand-new car/truck at about 1,500-3,000 miles because there are
little beasties in the engine that come off into the oil, remove it
asap and switch to synthetic from then forward.

Bottom line: You can use non-synthetic from day one, change it every
3,000 and you will not have an "oil" related problem with your Toyota
engine ever. it's always something else; alternators, timing (I have
the chain so I'm not worried), starter, etc.

Change out ALL of your front & rear differential oils ASAP to dyno or
synthetic, you will SH*T when you see the garbage in the gear oil and
on the magnetic plug. Change out the transmission at 30,000 to dyno or
synthetic, same thing and do it every 30,000. I have Amsoil in the
tranny, Mobil1 in the front/rear & transfer case.

Heres the link in case your interested in reading more.

http://www.tacomaworld.com/forum/2nd-gen-tacomas/5167-brand-new-toyota-has-break
-oil-correct.html

Read the manual, then follow the directions it contains.

Toyota's web site has a free service schedule. Just enter your year,
model, and mileage and out pops the needed service items.

In 2004, Toyota lowered the oil service interval from 7500 miles down
to 5000 miles because of sludge concerns, while GM and Honda press for
12,000 miles. Go figure. I never thought 22RE had any sludge problems,
but the cylinder head temperature may have been cranked up for lower
emissions.

"Oil change? Recommendations offered by automakers":
http://findarticles.com/p/articles/mi_qn4188/is_20070326/ai_n18758842