Welcome Joanie! How's Cha-chi doing these days?

(Couldn't resist, sorry).
Congrats on your purchase...I have one as well, sans the VVTi. The oil filter is located at the front of the engine, just right below the exhaust manifold. It's just below that heat shield in the pic...I dunno why Toyota always hides their filters like that.
I dunno what kinda maintenance you're planning to do on a brand new 03 Camry, but you probably won't need factory service manuals for now...try getting a Haynes or Chiltons manual (not even sure if they have them out yet, but 10x cheaper.). They're pretty decent for the DIYer's...
Hope you enjoy the car!