Transfering apps without iCloud

A friend recently gave me her iphone 4, however it has not been updated, so it doesn't have iCloud. We were expecting to transfer her purchased apps through iCloud, but when I try to update the phone, it will erase all of the apps. How would I be able to transfer her apps on her new iphone 5, without downloading iCloud first, or how would I update my iphone to get iCloud, without it deleting the apps off of the phone?