If Madara died at 80+ why does his Edo look like 20? Elder Chiyo's Edo was not young.
Simple explanation: Hashi cells reduces ageing and Tobirama always had white rain u cant tell his age.
Databook also said Oro created Edo tensei. Also Hashirama and Madara is said to have fought many wars before the truce and formation of fisrt village Konoha, and also considering the fact that Jashi died after he defeated Madara, then gathered and distributed them the later formed new villages he didnt die young.
Tobirama was hokage even before hashi died or didnt u see this:
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which suggests Hashirama was tierd, by the time Hizune was 7-9 so none living knows Hashirama prime.