What is the point of the human body getting a fever when you have a cold? is the fevers purpose to kill off the germs?

Fever: Great question. There is substantial evidence to suggest that some infections in which fever occurs are limited because the causative organisms do not tolerate the increase in temperature well. Fever is very non-specific and is simply a response to cytokines released by cells responding to inflammation, or an imbalance of temperature generation with inadequate loss of temp thru sweating, etc.