If you are in to a manufacturing unit then the leaves are to be as per Factories Act or in to an office or non manufacturing area then the same is to be as per the Shops & establishments Act of that particular State are to be followed. Over and above the Statutory norms if the organization wants to provide then it is left to the Management concerned ex: some of the Organizations comes under Factories Act are providing Casual / Sick Leave, special leaves & more Earned leaves than the numbers stipulated under Factories Act.
As far as Salaries are concerned you need to Comply with the Statutory norms under Minimum wages Act., over and above this the paying capacity of the Management, the salaries and wage structures of the similar industries, the domain where your business is located ( for the purpose of cost of living part etc.,).
Hope you are clear.
Thanks
Kameswarao