PAL is 768 x 576 @ 25fps
PAL DV is 720 x 576 @ 25fps (pixel aspect ratio is 1,0666...)
Normally these are also interlaced so they're actually 50 fields per second.
Action safe are means that almost every TV crops the image a bit meaning the whole picture is not necessarily shown. So you should leave about 10% border around the frame where you should not put any important action.