Alright.. xD lemme answer those.
First off, this site is just a forum. Nothing more than that, so there isn't any Pokemon to raise. If people have trainer cards then that means they made them to represent their gameboy/DS teams. You can either find Trainer Card generators on google, or have someone on here make them for you.
Now, as for PMs, if you see someone you want to PM, you have two choices.
The first is to find their username on a thread, click it, and then you get the drop down menu. One of the options says "Send a private message to _____", OR up at the top of the page, below your username, there's a link that says 'Private Messages'. Clicking that takes you to your inbox, where you can send, or check PMs. :D
That aside, welcome to the forums!
Regardless of the fact that there are no Pokemon to train here, I hope you enjoy this place. xD
Also, if you have anymore questions you can always PM me, or ask me over profiles comments.