Best bet for a 5th Gen 4Runner Repair Manual is the one Nashman69g setup years ago. It's based on the 2010 model, but the vast majorty of it applies across the board from 2010 to the present. Here's a link for the files you can download:
My Files
If it's Chiltons you want, their online doc is available for free at the Roswell New Mexico Public Library. Not just 4R, but other models of Toyota and other vehicle Makes.
Chilton Auto Repair Library | Roswell, NM
Once inside - select -> Chilton Library - Bluish/Green colored bar - scroll to find it
Then select -> ChiltonLibrary.com
City -> Roswell - Zipcode - 88202 - click Access Now
These online Chilton manuals are very much like the factory doc and not at all like the paperback books.
I later in the day tried this and got a msg that more or less rejected my logon just as it had when I tried using my local zip code, so I tried another NM city -> Las Cruces - 88203 and it worked. Not sure what's going on. Maybe their server is detecting access from out-of-state...might take awhile for this to happen.
Beware - you may have to learn the names and zipcodes of a lot of NM cities in order to access the Chilton Auto Repair manuals at the Roswell NM public library.
After a few days the access issue cleared up for me and I now simply use the city -> Roswell and zipcode 88202. Have been in and out of it many times over the past couple of months.