Gather account details off facebook, add to new register account

So what Im trying to do is create a cross platform blog. Not sure if I am posting in the right area, please replace. I apologize ahead of time.
Im using wordpress for a profile system.

Conceivably, what I want to do is this:
When someone creates an account, they link it to their facebook. Thereafter, the account details from their facebook is added to current profile.
Also, it would be great if I could get this:
When they post on the forum, they also have the option to post the same thing on facebook.
Its pretty much the same idea as what Tinder does when registering and using
https://www.gotinder.com/

Not sure if a plugin exist, if one does, that kicks ass. If not, does anyone know where i can find a good tutorial explaining, step by step, how to do this.

Thanks!