The Wilco Johnson Tele does have a fairly dark neck, and the kit maple is pretty light in colour, so I'd say you'd need at least one amber coat. The more coats, the darker the look. Then I'd go over it with several clear coats for more protection.
On a slightly different note, do you need to sand the actual fingerboard? Should that be stained or left the original color of the wood (even if you stain the back of the necK)? I assume that should be finished with the Tried and Tue also? Or would you use a different oil?