Can't install lib32ncurses5-dev or ia32-libs
ia32-libs is in the universe component. It sounds like you don't have this repository enabled.
You need to enable it, either in Software Center -> Software Sources, or by editing /etc/apt/sources.list and uncommenting lines with universe at the end.
Don't forget to do an apt-get update (or press Update in Update Manager)
This problem existed on Ubuntu 11.10.
I solved the issue by opening a terminal and used the following command:
sudo apt-get install libncurses5-dev:i386