I use blockchain to create new address...and I did not see any private key with the new address. And if I can send money from new address in blockchain without private key it is great but I am afraid that when I use the new address to send money it is required to put private key again.
I don't think you're getting the point of this. It is impossible for ANYONE to send ANY money without the private key. If you are able to send from Blockchain, it means that your Blockchain wallet DOES have the private keys, and you simply don't know where to look for them.
Frst, make sure that nobody is looking over your shounder or recording your screen with a camera.
Click Import/Export, and select the "export unencrypted" option. In the dropdown, select the "Bitcoin-QT format" option, as it is accepted by most wallets. You will see a text area with lines such as:
{"addr":"1XXXXXXXXXXXXXXXXXXXXXx","priv":"5J4XXXXXXXXXXXXXX","created_time":0,"created_device_version":"0","tag":2,"created_device_name":"external"}
The 5J4XXXXXXXXXXXXXX part is the private key for that address. Keep it safe.
Unrelatedly, "Need help with Bitcoin" is a extremely vague title for a thread in "Technical support" of a Bitcoin forum. Use a more descriptive title next time.