What is the difference between 不 and 没?
不 is the negative prefix for a verb and adjective, here are some examples:
不对,not right;
不好，not good;
不错，not bad;
你想去购物吗?不去.Do you want to go shopping? No,I don't;

However 没 is focused on existence or ownership, for example:
没有，I don't have it.
从没发生过，This never happens before.
这里没有人, No one is here.
我没钱, I don't have money.

I hope you are clear now!