Yes, you sure can. You can also use Time Machine which comes installed on your iMac to back up your data daily all that external hard drive.
You will need to take your iMac apart and replace the hard drive. A better solution is to connect an external hard drive to your Mac via the Firewire port.
The best way would probably be to get a hardware specialist to download the photos of the main drive of your iMac.
No Macintosh has included a floppy drive since the release of the iMac G3 in 1998. If you need to use a floppy disk, you will have to purchase an external USB drive.
An "Intel-based iMac G5" would be an oxymoron. The "G5" part of it's name refers to having a PowerPC processor.
If your Mac has crashed and you have lost all data then unless you made a backup of all the photos they cannot be replaced. If you used Time Machine and your iMac was connected to an external hard drive then all your photos are on that external hard drive. Simply open Time Machine and restore all the photos to iPhoto.
Connect the external speaker system to the Audio Output on the rear of the iMac. It is the connection on the far left of the rear of the iMac when you are looking at the rear. The speakers will have to be self powered speakers computer speakers.
It will not recognize any Windows software but will recognize JPG photos and music.
The standard hard drive on the iMac as of 3/13 is 1 TB.
iMac computers do not support Blue-Ray out-of-the-box. You could try using an external USB Blu-ray drive. No guaranteed the results will be satisfactory. You can also use a Blu-ray ripper to rip the ISO to MP4 or other common formats that your iMac supports.
Plug the USB flash drive into your iMac. Wait for the icon for the drive to appear on your desktop. Right click the icon and then click open.
The base 21.5" iMac comes with a 4GB of Ram and a 500 GB hard drive. You can upgrade to 8 GB of Ram. Top of the line 21.5" iMac can be upgraded to 16GB of Ram and comes with a 1TB hard drive and can be upgraded to a 2 TB hard drive. The 27" iMac comes with 4GB of Ram and 1TB hard drive. Can be upgraded to 16GB of Ram and a 2TB hard drive.
Yes, it does.