Thanks for your question.
If you use google you could find quite good resources where they talk about your ldr and ntc. If you didn't know anything about it you could start searching in wikipedia about ntc and ldr.
I have found some good examples for your request : http://www.arduinoacademy.com/2011/12/04/tutorial-arduino-0005-sensor-de-temperatura-ntc/
This source is in Spanish if you could speak Spanish here you could find quite good tutorials.
If you don't you have quite good examples at arduino.cc forum like: http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1255287054 http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1244238888
Regards and best whises