Friends
From one of my friend I heard that we can use android apps on our pc...
Can I use Android Apps on my laptop?
And If yes,please tell me How?
You need an android emulator for that. You can look for a standalone emulator or download the android SDK for eclipse and you'll have some too.
Here is another thread speaking of how to install the market on the emulator:
Install BlueStack by AMD. Bluestacks web page. This works on Intel Based Windows machines also. I have not tried it on Mac.
You can install a virtual machine like VMWare or VirtualBox to run Android in your PC. Example: http://www.kirsle.net/blog/kirsle/android-4-0-in-virtualbox