I don't know exactly how much space is taken up, but I'd say perhaps around 10-15 Gb or so? Someone will correct me on that I'm sure, I could be way off.
What I can provide you though are some tips on how to free up some HDD space after everything is installed:
- use
OmniDiskSweeper (not free) or my personal favorite
WhatSize (free) to determine what all is taking up room on your HDD and where it is
- I also recommend
Disk Inventory X to view HDD usage - it graphically shows you what is taking up space with a decent presentation and UI
- remove GarageBand and iDVD if you do not need them - that should free up around 6 GB right there
- check out /Library/Printers/ - 2 GB of printer drivers that you may or may not need
- use
Monolingual to remove the unnecessary language resources from your Mac*. Another option is to use
Delocalizer
- lastly, you could always use
AppZapper (not free) or
uApp (free) to ensure that when you uninstall any programs that all those pesky sub-folders, etc. are deleted
That should just about do it.
* a note about Monolingual. If you are not careful this can seriously screw up your Mac if it is Intel-based. Basically, leave the Architectures settings alone. If you delete G3, G4, G5 then anything which is PPC-based which will try to run under Rosetta,
won't. Otherwise, Monolingual is great.