Alright, I got the account. I'm able to log in to mojang/minecraft websites. I downloaded the client and downloade the game with the account and succesfull authenticate to official servers. Changing the password is also possible.
OP's reply waw fast and included nesseccery info. I'd recomend his services.
But can you change the email as changing the password is pointless if the original owner has email access.
I also said you can change the email lol look at the post title and details.