2001 Chysler Grand Voyager smoke and clicking noise from co

Engine problem
2001 Chysler Grand Voyager Engine Size unknown Two Wheel Drive Manual 98000 miles

Hi,
My car has a clicking noise from behind the dash board when starting from cold. This is accompanied by a slight whining noise too. Then after driving for a few miles and stopping there is a lot of white smoke coming from a pipe outside below the passenger door. Someone told me this was another part of the exhaust system?
Would appreciate any help that you can give me.
Many thanks
Mike