Dont know which flourescent tubes to get for seedlings and cutting's will i be best to use a combination of colours? Or just one type?

Daylight/cool white 6,400k would be best for those in my opinion.

yep, cool white or coolwhite/warm mix is supposed to be the best.

If you can't find any, don't worry. I do all my vegging with the "wrong" lights and they don't appear to mind

The main thing I find is not to understimate the amount of light seedlings will greedily swallow - so get lots of 'em

I really doubt there's much in it.
Go for cheapness and convenience.

You want to get them under the MH as soon as possible.
The savings don't add up to much - and they'll love your MH lamp.

Have tried diff colour temps and combo's of colours and honestly, Cool white works just as well as anything else. I personally don't see the point in spending $20 (warm whites, daylight tubes etc.....)on a tube when I can spend $2 (cool white) and it works just as well

Hope this helps

Cheers

Paca