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First, just for clarification, you have a Mac (short for Macintosh from Apple), not a MAC (referring to the hardware address of a networking interface). This is a subtle, but important difference.
Second, have you tried simply selecting the Time Capsule as your Time Machine drive in the Time Machine preferences, opening up the Time Machine application, and simply copying the items over or using the restore option? This should work wirelessly, though it will be faster over an ethernet connection, which should be connected between the ethernet port on your iMac and one of the ethernet ports on the Time Capsule (not the TC's WAN port; that's for connecting to your DSL or cable modem).
Or if you want to restore your whole system, follow the steps below (directly from Apple help):
o recover your entire system:
Connect your Time Machine backup disk to your computer.
If you’re restoring your system because of a problem with your startup disk, make sure the disk has been repaired or replaced.
Insert your Mac OS X Install disc, and double-click the Install Mac OS X icon.
NOTE: If you are using Remote Install Mac OS X, make sure your computer is set up for remote installation, and then complete steps 3 through 7.
Using Remote Install Mac OS X
In the Installer, choose Utilities > Restore System From Backup.
In the Restore Your System dialog, click Continue.
Select your Time Machine backup volume.
Select the Time Machine backup you want to restore.
Follow the onscreen instructions.