Oil leaking around crankshaft pulley
 

Hi was getting a Sid warning low oil pressure on start up awhile back. Then low oil on checking level noticed level was low and oil leaking around left hand side off engine and on belt , pulley. Was thinking pump and crank seals but on reading a few posts about pcv valves and pipes being replaced. Need to get to the problem quickly cant afford a costly Saab bill at the minute so any help please. I topped up oil and still driving short trips til I get seals for a long weekend ahead