I have a wallet at blockchain.info and I would like to transfer It to bitcoin core qt so my funds would apear on my bitcoin core qt, how do I do that?
First i would download the blockchain. You can get it from a trusted source, as above, or just wait and let bitcoin-QT download the whole thing. It may take days, but you don't need to do anything except wait for synchronization.
Once you are caught up you can go to "receiving" in QT and create a new receiving address. That address is what you want. If you send bitcoin from blockchain.info to that address it will show up in your QT wallet. If you send it before you are synchronized it will still work, but you wont see the balance in qt until your synced.
P.S. once you have transferred funds to QT you should make a backup copy of your wallet.dat file.
That's all.
Thanks for this explanation, I will probably download blockchain because I see It will take week or even more to synchronize everything and I went to receiving addresses and there is already address added but I didn't add anything, so It ok to use that address? And each time I create new label new random address adds up but I can't choose myself the address.