It depends on what edition you have and what you enable, but my Vista installation (Vista Home Premium) took 10GB of space.
20-40GB depending on version. https://www.microsoft.com/windows/windows-vista/get/system-requirements.aspx
If it has the minimum RAM and hard drive space, you can.
Windows Vista Ready means that the PC does not have Windows Vista on it, but it can be easily upgraded for an additional price. If you buy a PC with Vista, you will get Vista already installed for no extra money.
no its a file that vista and windows 7 needs to not have bsods on startup
no it needs at least windows vista
That edition of Windows Vista does not exist. Windows Vista exists in two editions for home users: Windows Vista Home Basic and Windows Vista Home Premium.
No your windows 7 will not deleted
No. Obviously, if you upgrade to Windows Vista, you will have Windows Vista.
It is possible to download Space Cadet Pinball on Windows Vista. Just download the file and click run. Then install it to the default location to find it in the Games menu like in previous versions.
A 20GB hard drive with at least 15GB free space.
No.
Windows Vista is not an option for the iPhone.