How to list all the files changed by a perforce change list

That’s the describe command. To describe a particular changelist, you want p4 describe <changelist number>.

Update:

If you only want the file names, you can use the files command with the -F option to override the output format: p4 -Ztag -F "%depotFile%" files @=<changelist>

See http://www.perforce.com/blog/130826/fun-formatting for more information about the -F option.