I just started reading the "Tales of the Jedi" comics and I would recommend them. It's a little tricky to find all of them online, but I managed.
The comics are a good segway into KOTOR. It helps you to better understand the Jedi Council's reluctance to aid the Republic with Revan and Malak. Exar Kun was easily able to seduce Jedi students to the darkside and the Jedi Masters feared something similar to happen.
Exar Kun called himself a Jedi archeologist so that he could study ancient Sith teachings. His Jedi Master, Vodo Siosk-Baas(I think), held a Sith holocron with ancient Sith teachings. I don't want to give too much away, but basically, the Spirit of Freedon Nadd lead Exar Kun to the darkside. Many of the Jedi artifacts, ancient lightsabers, holocrons, etc. were lost in the war, but not all were lost. So, I'm sure the history of the Jedi and Sith were taught to the future Jedis up until the rise of Darth Vader.
So yeah, I recommend that everybody who loved KOTOR should pick up these comics.