Idaho Vital Records

how do i get birth and death records from vital statistics in boise idaho for free?

You don’t.
These are government documents, and there will always be a processing fee. The records are not created for genealogical reasons.. in fact, some clerks are actually hostile at the amount of time that it takes from their usual job, for immediate use. Not to mention.. those silly clerks just REFUSE to come to work, for free.