future-pilot: There is no 'security bond', at least not with the CTC Wings course. You fund the 69 grand either out of your own pocket, or you take a loan out.
The nature of the loan is up to you and whatever bank you choose to get the loan with.
The course fee is fully inclusive bar the few items you must pay for yourself, those are listed on the CTC website and in the joining literature, and living expenses (accommodation is included.)
You'll be able to get a lot more info at the open day and selection day.