By adding "Ko"at the beginning of a specific word it adds the word little in it?
They can be hard to distinguish, depending on the font that's used, but in this case: り = the "ri" in ひらがな, and リ = the "ri" in カタカナ.
And just FYI in case you didn't already know: hiragana and katakana are two 'alphabets' of about 50 characters each, containing the same set of sounds.
り and リ are both the "ri" sound, with the former being hiragana and the latter katakana.
While リ is pretty much always the same, the connection between the first and second vertical stroke isn't always there in the hiragana り, as you can see in this example: http://mjapanese.bravehost.com/JpnFonts/hirafont3.jpg
That's not the relevant usage here. I assume that hint is referring to this grammatical feature used to indicate a non-exhaustive, non-sequential list in Japanese.
The verb you're probably looking for, 取る, is read "toru". According to jisho.org 取り (also read as "tori") is a noun, not a verb. Here's its definition:
- taking; taker; collecting; collector; remover; removal (used as a suffix)
- last performer of the day (usu. the star performer); last performance of the day
- active partner (e.g. in judo demonstration)
- emphatic or formal prefix before a verb