Hope you might have got the answer to both of your queries. If not, let me focus on the same.
Coming to Salary Breakup:
Cost to company is divided into components and given different names to those components like:
1) Basic: it should be 40-50% of CTC.
2) HRA (House Rent Allowances): it should be 50% of basic.
3) Conveyance: as per the Shops and Establishment Act, should not be more than Rs. 800 per month (800*12 = 9600) should be directly mentioned in the CTC.
4) LTA: Leave Travel Assessee: Should be one time from your basic salary.
5) Medical Allowance: it should be 1250 per month (=1250*12=15,000).
6) Special Allowances (SA): CTC - (1+2+3+4+5) = Special Allowances.
7) Holiday Work
You can create as many components as you like, and be careful while creating all these components. Try to make as many components as possible that are not taxable income components (like Hard furniture, Soft furniture, Child Education, LTA, Medical Allowance, HRA, Car Maintenance, Petrol Reimbursements, Telephone Reimbursements, etc.).
Coming to ESIC: as you said that your company has experience in the industry for about 25 years and now wants to create an account in ESIC Act. I just want to know how many employees are working with your organization and what is the Salary Bracket you are following. If your salary bracket is more than 10,000, then there is no need to open an account in the ESIC department. If not, then approach a consultant who has much experience in all departments (like Labour Department, PF ESIC department, etc.).
If you need a more detailed explanation, feel free to get in touch with the below-mentioned contact number or through my web address.