Recently someone had access to my lap top, a week later a invitation was sent from my Facebook account to one of my friends.with my e-mail address. My friend is already on my Facebook.and now other invitations have been sent to my friends on msn.is it possible to track the persons ip address from the computer they are sending these messages from.and stop them.

No.

Sounds to me like someone has accessed you e-mail account and gone from there.
It's amazing what a little social engineering can achieve ;)