Your Talon Karrde and Obi-Wan are custom painted and not as Hasbro made them. They're decent paint jobs, but customised nonetheless.
The X-Wing pilot with the silver harness looks like Luke from the Legacy Collection 'LUKE SKYWALKER & R2-D2' Droid Factory 2-pack (http://www.rebelscum.com/tlcDF6.asp
), minus his helmet and accessories, and with a head swap... or it may be a different figure altogether. You will find the answers to your questions here: http://www.rebelscum.com/hasbro.asp
and you can search through it just as easily as me