Consequences of terminating a limited labour contract on the employee

I’m on a 2-year limited contract. I initially completed the 2 years and renewed for another 2 years. I have now completed the 3rd year and have less than a year left on the renewed limited contract.

I want to resign. Do I have to pay 2 months salary as a penalty?

Can I negotiate with my employer to have this waived?

What if I do not have the money to pay the employer? What can they do?