The Mac's iPhoto application will use whatever disc space is needed that is available, either on the internal hard disc or an external disc, depending on the size of the content in the photo library. There is no specific limit in gigabytes.
All Macs come with Apple's iLife software which includes iPhoto.
A new MacBook comes with iLife '09 which includes iPhoto, iMovie, GarageBand, iWeb, iDVD.
Not really, iPhoto is more for sorting your photos but you can perform simple edits on pictures, for example removing red-eye and cropping. You can still buy Photoshop for Macs, though.
Downloading iPhoto is a much more common option with the Macintosh computer than it was a few years ago. As long as the Mac has an OSX recent enough (typically 10.1 and above), with 256 megabytes of hard drive space and a 400 megahertz processor, iPhoto can be downloaded onto it.
It's possible you are trying to open an older version of iPhoto. Software written for PPC CPUs won't run on Intel Macs with the latest OS.
if they are both modern macs then they will have bluetooth where you can transfer pretty much anything. You can also use a memory stick or portable hard-drive.
No, but Minecraft does work on Macs.
iPhoto is part of the iLife suite of software supplied with Macs and is not available for other operating systems.
They come in black, white, and sliver.
Yes some Refurbished macs have a 30-Day Money-Back Satisfaction Guarantee!
most likely all macs come with ichat
All macs come new with iTunes and if set properly can be set to download all of the frequent free software updates to the software that apple makes available.