1. QuickSync may work with v2 E3-1285 processors or v3 Intel core processors however the kernel version may need to be downgraded. For this reason, we recommend the v3 E3-1285 or v4 Intel core processors.
2. There shouldn't be any extra fees with using the Intel Media SDK.
3. Yes, it should work with Ubuntu 14.04 LTS however, you may need to watch the kernel version that is used.
4. QuickSync is only available on certain E3 & Intel Core processors which are only designed for motherboards with a single CPU socket and a maximum of 32GB ram.
Correct, you don't require such processors to run Transcoding with NVIDIA cards. If you did have such CPUs as well, they could still act as additional Transcoding resources, where some streams could use NVENC and others could be configured to use QuickSync. Hopefully there wouldn't be any sort of driver contention.