The [2N3904][1] and [2N3906][2] are *very** common NPN and PNP transistors, and can be used in most any circuit that calls for small-signal (as opposed to power) transistors.    You can get the datasheets by Googling the part number along with the word datasheet, several ones will show up.  I'm not familiar with the other part numbers but you can try looking them up in a distributor's webpage like [Digi-Key][3], or try just Googling the part number. 


  [1]: http://en.wikipedia.org/wiki/2N3904
  [2]: http://en.wikipedia.org/wiki/2N3906
  [3]: http://www.digikey.com/