2003 mazda 6 diesel 2L s (120) i think,oil leaks
 

hello guys im new here and don't know that much about the mazda 6,
about 4 weeks ago I brought a 2003 mazda 6 s 2L diesel right hand drive (120) or that's what my insure said anyway.
anyway I do like the car but got a few probs but the main one is its leaving puddles of oil on my drive so I got out there today and had a look and I think ive got 3 oil leaks, 1 is coming from the front on the engine on the left (drivers side)any ideas?. 2 is coming from the drivers side again but the back of the engine maybe cam seal by what ive read, 3 is gearbox oil coming from where the driveshaft joins the gearbox, driveshaft oil seal looks in a bad way, what oil does the gearbox take? and how much? and number 4 which is the worst is coming from the front of the engine on the right if looking under the hood (passanger side) near the air box rubber,

hope im not braking any rules in this post, heres links for the worse oil leak
http://i1193.photobucket.com/albums/...ps30030ca4.jpg
http://i1193.photobucket.com/albums/...ps8a555c31.jpg
and thank you for taking the time to read this
brett