Remotely controlling my computer
 

So, I want to use my computer from work, what kind of software do I need? I have Mandrake. I have Windows at work on my computer, so I was guessing can I use example Putty to connect to my computer with SSH and control it via terminal? And if so, how is it done? How do I set up the accounts / passwords etc.

To access your machine with SSH you need sshd running. In Mandrake, its basic configuration will work (using system accounts). You can test it locally using
ssh localhost

You may also think about limiting IPs outside that will be able to connect to your machine (to your machine at work).

ssh is good if you just need terminal access. If you want a GUI maybe try RealVNC, load the server on the you linux box and the client on you windows box and you're ready to go.