Do I still need to purchase the MPEG-2 and VC-1 license keys for the Raspberry Pi 2?
If so, will the same MPEG-2 and VC-1 licenses available in the Raspberry Pi store work with the Raspberry Pi 2?
Do I still need CODEC licences?
Yes, if you want to use the HW decoders. However, the higher speed of the device MIGHT mean a SW decoder can be used. This will depend on the resolution of the video you are trying to display.