He is gorgeous, but it is extremely unlikely he is a Turkish Angora. They are a rare breed and hardly ever found in shelters. If he had escaped from a breeder he would be microchipped. What do you know of his history?
The head and ears are different from a TUA, but the coat looks a bit similar than an Angoras. Very unlikely that he actually has any Angora in him though. He is very pretty.
He is very handsome, but most likely not a Turkish Angora as they are a rare breed. The odd-eyes (two different colored eyes) is more common in certain breeds, but it does also show up in the regular domestic random-bred (non purebred/no particular breed) cat population as well. He most likely is just a regular domestic longhair cat who happened to inherit the white color, longhair genes, and the odd-eyes...
If he is friendly and outgoing, you might considered entering him in a cat show because he is very handsome, and the household pet categories go mostly by looks (and health/grooming) so I bet he would do well.