At a small house south of Saffron City, a man called Mr Psychic will give you the TM.
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You can find TM Dragon Claw on Victory Road in Pokemon FireRed (Kanto).
Ancient power in not a TM.
That TM is not in firered.
you cannot get the tm but you can find the move drill peck with zapdos
You can "purchase" a flamethrower TM in the game corner coin-tradey place.