Not sure it has to be formatted. Can't hurt I guess. It would depend on how you cloned it "exactly". If you cloned entire disk then you won't need extra steps until you boot to new larger drive or exact size drive. If you are cloning windows, it may never work due to other reasons.
You need to have that set of file available either directly attached or via network.
See this for examples. http://clonezilla.org/show-live-doc-...ore_disk_image