There are three folders here:
linuxkernel: This contains the modified linux kernel adapted to PodArch.
toolchain: This contains the application toolchain that is used to convert regular applications to pod-enabled applications.
qemu: This contains PodArch-QEMU built on the top of x86-64. You'll need a disk image to run PodArch-QEMU on. Download it from here
Refer to README in each of the above folders.
Refer to README in podarch-QEMU/PodArch.