Can anyone tell me how to remove the panel covering the auto window opener switch. I have a bad switch in need of repair (passenger front door) ?

You need to remove the door panel in order to get access to the switch. I's not that hard. Unfortunately no repair manual is available for EC300 other tha big fat factory one; the procedure may be found in the Haynes book for the same year Camry.

Rro, do this
 

visit the website from my sig, I think the page 2 or 3 shows you how to take the door panel off.

for the repairing the switch, before you do anything, go to the Lex dealer and ask how much it costs the switch(es). then go ahead and change it.

good luck