Dear Arti
What you have cited, is not a standard industry practice; and that's the reason you find yourself in confusion/trouble.
Hope you understand what is -
CTC (which includes almost everything the company spends on the employee, including the PF and ESI contribution which an employer makes on behalf of the employee - also expenses on 'notional' gratuity is also added.);
Gross Salary (which includes everything paid to the employee in cash plus the deductions that have been effected from the employee like employee's share of PF, ESI or recovery of any loans/advances);
Net Salary (which is the ACTUAL amount after all deductions including Income Tax (TDS) which goes in the hands/bank account of the employee).
Hope the above three terms are clear to you. So if you know the Net Salary; then extrapolate the other amounts which are either paid by the employer on behalf of employee or deducted from the employee,
When you add what has been deducted from the salary to the Net Salary; you arrive at the Gross Salary.
To Gross Salary, when you add the amount paid/spent by the employer (which are not paid/payable to the employee presently) you arrive at the CTC .
Another point to be noted is : An employer can not pay TDS of the employee; as it has to be deducted from the salary. Any TDS paid by the employer is ADDED to the SALARY of the employee; this is the view adopted by the Income Tax authorities. So this illegal/unethical practice needs to be discontinued.
Hope the above clarifies the issue.
Warm regards.