Macbook Pro (Core Duo Mid 2006) won't boot

My macbook pro won't boot. I'm suspecting that the HD has gone out again, but I also don't seem to be able to boot from a CD. When I startup, it gives me a grey apple screen with a spinning gear. I tried running disk first aid from the command line and it said the B-Tree was corrupt and could not be repaired.
What has me confused is that I am also unable to boot from a CD/DVD. When I startup with a CD in the drive, it spins up and then ejects. If I insert it again, it spins up again, then spins slower, but I can still hear it spinning and just hangs. It seems to make no difference if I hold the C-key or not. I have tried 3 different MacOS X disks and a DiskWarrior disk all with the same result.
I've also tried zapping the PRAM and letting it sit unpowered with the battery out.
Leading up to all of this, the computer got very slow.
Any ideas? I'd like to have a feeling that my CD/DVD drive isn't broken before I spend any money on a new HD. The computer is 6 years old, but I'm just not ready to spend another $1-2k on a new one.
Thanks

kert2 wrote:
The computer is 6 years old, but I'm just not ready to spend another $1-2k on a new one.
You got 6 years out of it, it's 1.5 years past average of 4.5 years, hopefully it's a software issue.
Run through these User Tips, it's for 10.6 which you should be on (call Apple via phone for the 10.6 disks) and give it your best shot to extend it's life a bit longer.
https://discussions.apple.com/community/notebooks/macbook_pro?view=documents#/?p er_page=50

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