My guess would be something like this: Smith, John Jr.
yes
Last name Jr., Firstname
You meant their debut? I think last 2008.
[lastname], [firstname] jr.
Junior's
You cannot locate a person nowadays with only the first name. There are too many people with the same names -- even if you have the first AND last names, you're going to have to hunt through a list!
If the son's name is exactly the same as his father's (first, middle and last) then he may be called "Junior", or he could use "the Second" if he prefers. There is no requirement that he use either suffix.
Last Exit - Junior Boys album - was created on 2004-06-07.
To write "Captain" using the last name first, it would typically be in the form of "Captain [Last Name]." For example, "Captain Smith."
Last Name, First (Given) Name, III
There are no "new members" in Super Junior. The last member that was added was Kyuhyun. He is the 13th member and also the last.
first person last and third