Japanese have many words that means "or". - Polite もしくは / moshikuwa または / matawa や / ya use は not わ in this case -Casual か / ka とか / toka

Hi! I'm just learning Japanese, but I think I can answer your question. "KA" is used for "OR" in sentences like Nomimono ha koohi ka o-cha ka deshita? "TOKA" is very similar. I heard it in sentences like - I can't write it completely in Japanese - "I said something like "..." toka "...." toka "..." toka "..." to excuse my reaction." But I heard this TOKA in situations when someone is surprised in an ironical way, something like, "Oh no, not really..." Or "Oh no, not that (again)" Or just "Jeez..." Hope I could help you a little bit. :)