How do I wire a 2way 2light system. On the upstairs landing I want to switch 2 lights on and off at each end of the corridor.
It sounds like you want a pretty straightforward lighting circuit with a 3-way switch at each end of the hallway controlling the lights. To do this, you must have 3 conductors running between the switches. The typical way to do this is to run a 3-conductor cable, such as 14/3 NM or MC cable. You can't legally string a lone wire through the attic, so pull new cable if you need it.
This answer might be helpful, and it references others.
You need two wires running between two 2-way switches. The common terminal on one switch has the live feed. The common terminal on the other switch is connected to the light bulb. The light will turn on if both switches are up or both are down.
No matter what they call them - they're 2-way switches. They can only be one way or the other.
If additional switches are required then cross-over switches are inserted between the other two. These have four terminals and connect straight through in one position and swap over in the other.
Isolate the circuit completely at the fuseboard before starting work, confirm the circuit is dead and don't switch back on until completed.
Electrical work can be a hazardous and lethal undertaking. If you have not been shown by an experienced tradesperson how this work is accomplished and what dangers to avoid, Than you might want to enlist the help of someone with experience with electricity. The reason for my answering in this manner is due to the way you are phrasing your question. I can't help but feel it might be better for you to hire someone for this job. If my assumption is completely incorrect and that you are soliciting answers to be able to understand how this installation should progress, please edit your question to add more detail and I will dutifully respond to the best of my abilities.