とか details
things like; or something — spoken listing that leaves the list open
週末はカラオケとかボウリングとか、どこか行こうよ。
shuumatsu wa karaoke toka bouringu toka, dokoka ikou yo.
Let's go somewhere this weekend — karaoke, bowling, whatever. casual
甘いものとか、どう？
amai mono toka, dou?
How about something sweet, maybe? casual
Examples
things like A and B — each item carries its own とか and the list is openly incomplete
週末はカラオケとかボウリングとか、どこか行こうよ。
shuumatsu wa karaoke toka bouringu toka, dokoka ikou yo.
Let's go somewhere this weekend — karaoke, bowling, whatever. casual
説明会では、仕事の内容とか給料とかについて話がありました。
setsumeikai de wa, shigoto no naiyou toka kyuuryou toka ni tsuite hanashi ga arimashita.
At the information session there was a talk about things like the job description and the pay. neutral
a single とか, hedging one item so it lands as a suggestion rather than a decision
甘いものとか、どう？
amai mono toka, dou?
How about something sweet, maybe? casual
熱があるなら、薬とか飲んだほうがいいよ。
netsu ga aru nara, kusuri toka nonda hou ga ii yo.
If you've got a fever, you should take some medicine or something. casual
Formation
{N}とかattaches to noun
Notes
which is where the noun frame here ends. とか does not belong in notices or
reports — that register wants など.
Related patterns
Similar
といった is the written counterpart and must be followed by the category noun its items exemplify (犬や猫といった動物); とか needs nothing after it and can trail off mid-sentence, which is why it belongs to speech.
など leans to writing and careful speech and closes the list from outside (AやBなど); とか is spoken and repeats on every item (AとかBとか), so a notice or a report takes など where a conversation takes とか.
と closes the list and claims it is complete — パンと牛乳 says those two and nothing else — while とか offers samples of a longer list and skews spoken, so a read-out shopping list takes と and an off-hand "bread and milk and that" takes とか.
Same open list, different register — や belongs to writing and careful speech and sits between the items only, while とか is spoken and characteristically repeats on the items (パンとか卵とか), so a notice takes や and a chat takes とか.
Lookalikes
The same とか on a different host — とかで hands over a reason the speaker heard second-hand and will not vouch for (風邪をひいたとかで休んだ), while listing とか claims nothing about where the information came from; both take clauses, so only the で and the reason reading separate them.