Questions about an Upgrade from a Mac Mini PPC G4

Hi all. I have some questions about the ability to use some disks and files from my 2006 mac mini PPC G4. I am interested in purchasing the 2014 mac mini. If you have real experience and can answer and of the questions, your response is greatly appreciated. Old System Specs: PowerPC G4
Boot ROM Version: 4.8.9f4
System Version: Mac OS X 10.4.11
Kernel Version: Darwin 8.11.0

My questions are:
1. I have an external FW/USB drive with files on it that I will want to use on the new mac mini. Specs are:
Partition Type: Apple_HFS
Journaled: Yes
Will I be able to plug this into the new mac mini and it mount for use?

2. I have some movie project files made with iMovie HD Version 5.0.2.
Will I be able to use these with the iMovie that comes with the new mac mini? Is there a migration path from my old version to the newest?

3. I have photo files from iPhoto Version 5.0.4. Will I be able to export/import the photos into Photos that comes with the new mac mini?
Is there a migration path from the old version to the newest?

Thanks ahead of time for the help.