You can download ttylinux from the official homepage, which at the moment is at http://www.minimalinux.org/ttylinux/.
Go to the downloads page and get the ISO image version if you want to burn ttylinux onto a bootable CD-ROM. This version of ttylinux can be booted on any PC that can boot from a CD-ROM drive. You can use it as a rescue system or for trying out ttylinux. You can also use the installer script to install the system onto hard disk after booting from the CD-ROM.
If you want to install by hand, you can find a binary tarball of the distribution on the downloads page. Grab this. Inside the archive you will find this user guide and a file called rootfs.gz, which is the compressed filesystem image for ttylinux itself. It contains an ext2 filesystem with the distribution installed on it.
The inidividual binary packages that were used to create the filesystem image are also available for download. You may want to download them if you use the package manager to remove a package from your ttylinux system and later need to reinstall it.
You can also download source code packages, including a build system that you can use to build a binary ttylinux package yourself. The build system package includes a README file that describes the process.