Your job offer does not need to be in the same occupation as your past work experience. However, you need to meet employment requirements for the job you are offered. The requirements are listed in the NOC.
Your results must be less than two years old when you apply.
Proof of funds
You will need to show that you have enough money to support yourself and your family after you immigrate. The amount you need depends on the size of your family and includes family members you support that are not immigrating with you.
You do not need to show proof if you are already living and working in Canada with a valid work permit.