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Can troops or units like raptors from the chaos space marines have to power fist , power claws, or one of both?

The codex options lists for units will answer all these questions. Though the only weapon you listed that can be used in pairs are lightning claws.

Different units can take multiple weapons. You should get the book for details.

I'm broke right now or I would

Usually only one and on the aspiring champs. Usually...

On aspiring champs?

The forum is not a substitute for buying the appropriate books.