No asking isn't a crime. But using metasploit to pop a neighbours XP machine is <- Just think things through and that remark using 'Tor', don't. I'm not sure if anyone who isn't familiar with metasploit is reading this, but if they are, Tor is somewhat an anonymous traffic router / chain proxy, and it will not be of use to you if you are using metasploit, or if you want to 'pwn' your friends. Metasploit is a learning tool by default, and once a user has fully comprehended the ins and outs, it becomes one tool in array of many for a professional penetration tester.
Instead install VirtualBox (A simple virtual machine can download for free, can run on pretty much any environment).
Install windows xp on it, try not to patch it beyond service pack 2(if you want to play with the ms08_067 exploit). Keep its firewall off, or turn file sharing on.
Then read through http://www.offensive-security.com/metasploit-unleashed/
And above all, read more, learn more, be responsible and have fun.
In short what I'm trying to say is if you are going to play with metasploit, play with it at home with a virtual machine, because using it in the 'wild' aka outside of the machines and networks you own and administer, is illegal, and easily detected without a comprehensive understanding of the field.