You can buy the adobe products from www.adobe.com and you can download trial version from there as well.
As for increasing quality of the videos, I hate to break it to you, but those guys from CSI getting great image quality from bad picture is a myth. It's not possible to do, the best quality will be the one it was shot at.
This is the truth. You can't create data out of thin air, so a low resolution picture, just won't be improvable.