Q1: We have two pictures here:
1 – That the company in which you work is a government company or a joint company between the government and the people, and in this case, the khums is not required in the deducted amounts except when it is received, and a year has passed from the time of its receipt.
2- The company is a private company, and in this case, khums must be paid in the amounts deducted at the end of each year.
But if you do not take out the khums, you must take it out as soon as you receive the money.
Hence, when you reach retirement age, and you start receiving a pension, you have to take khums out of pensions every month, and then dispose of the remaining four-fifths.
Q 2- There is no problem in your Hajj, your Hajj is valid, your actions are correct, and there is no problem with your clothes that you buy and wear, because you did not perform Hajj with money in which the khums is required, nor with Ihram in which khums is required, because the money in which khums is required is not in your possession.