So do they look at how long you have worked at your airline?

What if you list and they issue you the ticket? I assume this means everything is OK and you can go if there is a seat available?

Also, if I list with an airline, and the flight I listed for is out of JFK. Do I have to pay and pickup the ticket at the counter in JFK? Or can I go to a nearby airport with US Airways ticket counters and pick it up from there? Do I get the return ticket as well? Or is that issued later?

Sorry for all the questions, thanks!