Have a '98 Buick Century. It is very difficult to turn. Sometimes makes clicking noise. How bad is it?

Hi this could be a pump or a rack and pinion neither one is too expensive but it has to be diagnosed as one or the other.
A rack could cost 300-500 to repair pump 150-250.
I am sorry but I cannot say there is no danger in driveing it if you have a steering prob of any kind there is a certain amount of danger. Now I am not saying that maybe mom or dad can't drive it home or someone with more experience.

Hope this helps