i don't think you will need this light and that could be why it's not there since we don't have the option to switch the transfer case to neutral, read the following link.
Quick Question - what is "A/T P" on the dash?.
I had this problem on my chevy trucks since the had a 4wd/2wd/N selection lever.
The dash on the tundra is the same than the suv's and i think the have that option.