!can Tornado Warrior empower something that does not have the empower mechanic? Also, if Tornado Warrior dies after being played from hidden and resolving, does a card that gets empowered still get disempowered at the end of the turn?

Yes to both.

1. Empowering doesn't require the target to have the Empower keyword or any Empowered ability. Empower is a game action that gives any on-board game object (unit, gear, or legend) the Empowered status — it's a binary state any game object can hold (Rule 441.1–441.2). The status does nothing on its own; it only matters if another effect references it. The only restriction is the target can't already be Empowered (Rule 441.1.b–c). So Tornado Warrior can empower anything at its battlefield, even a vanilla card.

2. Yes. "Disempower it at end of turn" is a Delayed Trigger created when Tornado Warrior's play-from-hidden ability resolved. Delayed Abilities are not tied to their source's presence — they execute at their specified time regardless of whether the source is still on the board (Rule 392). So if Tornado Warrior dies, the disempower still fires at end of turn. One caveat: if the empowered card left the board (it loses Empowered when it leaves) or was already disempowered, the delayed trigger simply does nothing (Rule 442.1.a).