I installed Bitcoin Core on my laptop and copied ~22GB of bitcoin data from my PC (blocks folder, chainstate folder, wallet.dat ...)
I launched Bitcoin more than 6 hours ago and its still hasn't started. Task Manager shows that its using %60+ CPU and 500-600 MB RAM resources.
Is that normal?
Yes, it usually will take ~1 day to download the whole blockchain. Once downloaded your computer will serve as a full node while QT is open.
I think OP has already downloaded the full blockchain, the QT is rescanning now, not downloading blocks.