I got my raspberry pi kit today morning, with an SD card. My problem is I can't understand if the operating system is installed on the SD card. I don't have a power cable or display cable to test. However, when I put the SD card in my laptop it shows some binary files and .db files. What can I do for this problem?
"Some binary and db files" is a likely indication that the card contains the OS. You can easily armour your card with any of the available linux distros by following simple instructions from here.
You should see the following files on your SD card somewhere. I believe it is required that the boot partition contain them but not 100% sure on that requirement: