Carpets are CF, Tow Hitch is TO. There's a package with mats, cargo net and first aid kit, the code for that package is Z1. Could be the sunroof, that's SR.
haha..no i don't work for Toyota. I just remember a lot of these codes back when I was buying my 4Runner and researching the options. I think Edmunds lists out the codes when you try to build one on their site, but it could've been Kelly Blue Book.