I want to connect my camera :
1. To my car lighter place to get the power to my cam.
2. To my laptop so the memory of the camera will be my laptop hard disk and not the memory card in the camera.
Any ideas where to buy the power supply ? And how to connect the camera to the laptop ?
The Canon ACK-E8 power adapter accessory allows the camera to operate off AC power (no battery needed), but this is for AC power sources... your car would provide DC power.
There are third party battery charges which can charge from DC power, but I am not aware of one which provides a way to directly power the camera from DC power.
The EOS Utility (this was on the software CD that would have been in the original packaging with the new camera) supports "tethered shooting". This means you can connect the camera's supplied USB cable to the laptop, and the utility can remotely trigger the camera (and all images immediately import into the computer and are displayed.) Apple's "Aperture" supports tethered shooting and I *think* Lightroom does as well (I'm not a Lightroom user.)