So you can't access Facebook or use instant messenger, and you can't buy VPN/proxy service from us. By connecting to an unrestricted internet connection somewhere else, you can bypass these limits. Here's how:
If you need access to restricted web sites, read this tutorial.
If you need to access restricted web sites and instant messenger, ftp, or other restricted protocols, read this (easier for Windows users) or this one (easier for linux/osx/unix users). Both tutorials work for Windows and *nix-based operating systems.