Q: Firewire or Thunderbolt Cable?

Hello All,

I have 2 questions. One relates to my 2007 MacBook on which the CD drive no longer works. I need to reinstall the OS, and I have heard I can do this by using target disc mode and connecting the MacBook to my iMac. My first question is: What cable do I need to do this with? Do both of these predate the Thunderbolt Cable? If I do need to use a firewire cable can someone include a picture of what I should buy? There are pictures of my MacBook and iMac ports below.

My second question relates to installing Microsoft Word onto my brand new Macbook Air, which has no CD drive (I have word on DVD). Again, I figure I'll do this with target disc mode on the iMac, but again, I don't know which cable to use. The Macbook Air has a thunderbolt port. What does the iMac have?

Obviously I'm a novice, so feel free to respond in laymans terms! Thanks.