We have following questions and need your detailed explanations

1: Source code delivery details
2: What kind of framework?
3: What kind of person we need to hire to maintain the platform in-house?
4: What kind of server we should buy for the installation

5: Will they also provide us the IOS and Andriod APP? 
6: And of course full branding, knowledgebase and also freelancer examination and badge modules 
And also one legal questions:

is it safe to use the clone? Any legal risks?
And how to make sure that the source code you are providing is clean and not linked to any 3rd party database? For information security

7: Can we link the platform with our existing CRM? ( our CRM is in Microsoft)