privoxy

Hello folks. i live in a hostel and have to connect to the net via a proxy. Lets say my IP is 172.16.ab.cd the ip of my proxy is 172.16.pq.rs:80. the only open ports that i know of are 21,25,110,135,139,445 out of which i use 80 for net browsing. i wish to use Tor (& Privoxy) but don't know...