Do we know that the passport he got as an Illinois senator was his original issue?
That's important, if it's true.
Yes, obviously he needed a passport to go to Pakistan in 1981.
Pinging a couple of freepers who would likely know the details. I do not keep track of links or sources or where info it; I just store it messily in my mental file cabinet. I have read a number of times that the information was obtained (FOI??) from the State Department (again, IIRC, it was from some US agency/dept) that there is no record of 0bama holding a US passport before he was a senator.
Maybe he had a passport under the name Soetoro, but maybe Fred or Lucy will know the facts.