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Your selection of parts looks good
I myself don't mess with any plastic crap so I'd go down to the hardware store for a handfull of metal hose clamps. Make them tight but don't crush the plastic barbs. Same with hose, I just get it at the hardware store because its cheaper but I guess thats up to you. For my T line, here is my parts list (PVC)
1" PVC T
3x 1" PVC to 1/2 threaded adapters
2x 1/2 threaded barbs
1x 1/2 threaded cap
That setup is cheap and lets you bleed your system fast. Or you can use a T line with a fill port, it takes longer to fill the system but in the end takes up less space and may look better. I don't see how nozzles could help in a radaitor, you just want the water in and out, no special way to do it
Mounting the rad inside the case means that the rad is warming your case or your comp is warming the rad with hot air. Outside the case the rad gets fresh air. But the difference is small. I myself like to mount inside because it looks much better and is quieter. To mount it in a case you need to cut out the fan holes and drill the screw holes. I don't think it comes with mounting gear but you can use the same screws you'd use on a CD drive to mount the rad.
Did I miss anything? Good Luck!