Eh... I'am 100% sure you won't get to catch draganaor in Pokemon sapphire but of cause you can trade it.
Dragonair are found rarely at Mt. Coronet.
the only way is gameshark 4598F499 A44B5063 DRAGONAIR
In Pokemon Sapphire, Latios can be found in Southern Island.
It doesn't evolve Its at Level 70 In Sapphire
If you're talking about Professor Oak, he's not in Pokemon Sapphire.
Dratini evolves into dragonair and dragonair evolves into dragonite
in the water maybe
Dragonair cannot be found in the wild, nor its pre-evolution Dratini. (Which could have been used to evolve into Dragonair.) You would need to trade for it from someone who owns FireRed or LeafGreen.
dratini evolves on 33 to dragonair then dragonair evolves on 55
Evolve Dratini/ Dragonair. They can be found in the center of the Safari zone in the water.
In Pokemon Sapphire, Shuppet, Duskull, Vulpix and Chimecho can all be found on Mount Pyre.
The Move Deleter in Pokemon Ruby, Sapphire, and Emerald is found in Lilycove City.