my question is:
can u read you old massages that u have deleted??? if so where can i find them
No you can't. But you can read sent messages. Go to folders at the bottom of your inbox and scroll to "sent"
No, you cannot. If it is part of an old PM, that might have been included in a reply, you could try looking at your Sent folder to see if you can find a message from after the one you are looking for. However, there is no "trash can" for deleted messages.