There is no simple way to do this. It's not for the novice user as it requires a thorough understanding of Filemaker and the specific design methods used in the starter solutions. Some parts can be copied and pasted, others can be imported, but some must be manually done one step at a time and doing so in the wrong sequence can result in a situation where a lot of editing is needed to "reconnect" broken references to tables, fields or layout objects.
But I believe that there's already a combined version of the starter solutions available. You might web search for "FileMaker Starting Point Solutions" and see what you find.