When you are sick take plenty of rest and drink lots of water.
I don't think you have to take a bunch of medicines and antibiotic just for a normal cold
I don't think coffee will help you at all other than keep your body a bit warm. Coffee will keep you peeing and loosing water. Drinking a lot of water will help massively
I have had a really bad sore throat and cold. Everyday I drank about 2-3 cups of coffee and it made me feel very good. It actually helped me to get better