You can share the internet with a crossover cable.
https://askubuntu.com/questions/359856/share-wireless-internet-connection-through-ethernet
I am not sure about tor though.
- [Trisquel-users] Have my laptop "serving internet" to... gnuser
- Re: [Trisquel-users] Have my laptop "serving internet... usename343
- Re: [Trisquel-users] Have my laptop "serving internet... greatgnu
