Most people get all these terms confused with each other, so here is a page put together with all three explaining what each one is
Gods
Kame: the lowest god, oversees 1 planet
Kaioh: second level, oversees a section (North, South, East, or West) of a galaxy
Dai-Kaioh: the high Kaioh, oversees a whole galaxy
Kaioshin: next to the highest level, oversees a section of the universe (North, South, East, West)
Dai-Kaioshin: highest god, ruler of the universe
KI
Ki's are simply their powerlevel.They fight and they grown their Ki in order to be faster,get stronger.
Saiyans everytime they fight their Ki grows and they become even more powerful.Also Saiyans once they reach a certain level,they turn SSJ.
Most just have a level to reach to and that's it.An example of their Ki is when the DBZ gang is fighting Frieza and Frieza transformed for
the first time and he's powerlevel grew up to 1,000,000!!,and all those times their powering up.So now you know what a Ki is.
Kaio World / Kaios
This section will give a brief explanation of some of the Kaios in the Dragonball Saga. Some might be missing, if you do find some, please feel free
to send them in, as I will credit you:
Kaio-Sama:
He is also known as King Kai, the one who teaches Goku the Genki-Dama or the Soukidan. He is probably the best known Kaio there is.
He rules the Northern Galaxy.
Kaio-shin:
He is a friend of Gohan's and his Body guard is Kibit. He guards the Zeta Sword on his planet.
Kaio-Dou:
He is the Grand Kai in english versions, and he rules practically all of the Kaios. He is a groovy person and he kind of funky.
Yama-Dou:
He is the Kaio of Checkpoint. He is known as King Yama and sends people to either Heaven or Hell.
Kaio-sun:
He rules the southern galaxy, his best fighter is Pikehan, like Kaio-Sama with Goku. He is only seen in the Kaio-Tournaments and the episodes
and movies with Pikehan, like Janemba Movie.
Kaio-da:
She rules the Eastern Galaxy as she has the BLUE fighters or the fish fighters you see in the Kaio-Tournaments. She has a lot of good fighters
but not good enough to beat Goku or Pikehan.