A: You do not need FileMakerPro if you will be using the single user run-time version of FileMaker - it has FileMaker 6.0 prebound to it.

If you are using a multiuser deploy or want to customize (get in and make under-the-hood changes) on your installation of ebase you will need FileMakerPro 5.5 or 6.

You need FileMaker Server for a multiuser deployment; it should be either FileMaker Server 5.5 for PC or 6 for OS X.