This is not a direct substitution for the Factory Service Manual aka "The Toyota Bible", although it's a great supplement and covers almost as much information. It's also 10x better than a Haynes or Chiltons manual. Speaking of the FSM, a little Google search will find you online versions to download or print. I highly recommend doing both as the online versions are frequently taken down. I own a factory FSM for referencing and when I'm working on a project I'll print off the pages I'll need from the downloaded file so I won't feel bad getting my greasy paws all over it. Here is another link to a Factory Service Manual on Google Drive.
For the .pdf version of How To Keep Your Toyota Alive CLICK HERE
(covers 1975-1987 / 2WD & 4WD Toyotas)
You can also find this in print, however they're getting harder to find (and more expensive!), so keep your eyes open for a good deal. This is another one that you may want to print out so you don't mess up the pages while wrenching. Enjoy!