I have 2 questions: is 通り一遍 the term for these kinds of phrases?
I may not be understanding you correctly, but it's a fixed phrase in Japanese with the nuances that Ashikaga showed in his examples.
Also, how do you pronounce 通り一遍 in Hiragana?
とおりいっぺん is how you read it.
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Examples of なんとか:
お客さんが待っているんだ。なんとかならないかね!?
The customer is waiting. Can't you manage it somehow?
はい、なんとか間に合わせます。
Yes, I'm try to do/make it on time.
There are other uses I can't remember offhand...
Other uses of なんとか:
なんとかなる: To manage to do something (somehow).
明日の朝までに、100 ページのレポートを書け?自信はないけど、なんとかなると思います。
Write a 100-page report by tomorrow morning? I'm not entirely confident, but I think I can manage.
難しいけど、なんとかします。
It's difficult, but I'll manage.
なんとか:whatchamacallit; used when you can't recall the name
主演女優(しゅえんじょゆう)の名前?なんとかいったなあ~。
The name of the leading actress? I can't recall/It slipped my mind.