I am travelling to Thailand from India for vacation and have 10 hours of layover at Kuala Lumpur airport by Air Asia.
To visit near by places outside airport do I need the Transit Visa?
If yes then how I can get it?
As an Indian national you can transit without a visa as explained here Do I need a transit visa for Malaysia?
You need a visa if you want to leave the international transit area of Kuala Lumpur airport on your outbound journey. Depending on your itinerary you may be eligible for Visa on Arrival on your return trip (Indian nationals arriving from a third country which are Thailand, Singapore and Indonesia).