How long for Bitcoin core to initially synchronise? Now i tried sweeping with my private key but its says needed to confirm output no output
how long will [Bitcoin core] take to sync?


How long it takes to sync depends on your computer and your network connection.

It may take a week.

Bitcoin core will give you an estimate - but that assumes the computer is never turned off, never sleeps, hibernates or drops into a low-power mode and never runs other CPU-intensive tasks while core is syncing.


  is there a way to get the bitcoin out incase


in case of what?

You can export the private key and then import it into a lightweight (SPV) wallet which will allow you to spend your BTC without needing to download and verify the whole blockchain first.

See 


https://bitcoin.stackexchange.com/a/78758/13866 which covers debug console commands 

listreceivedbyaddress 0 true
dumpprivkey &lt;address&gt;

How can I export the private key for an address from the satoshi client?
List of wallets showing which support SPV