problems

[85 gti 16v]

my car started to leak oil and run rough. i was driving home and my car died at idle. i popped the hood and started my car i heard a sucking sound in the vacum system infront of the manifold. and my car will idle rough but the battery light comes on as if the altenator isnt working but the belts are less than a month onl and have no cracks. can any one help me out with advice. iv never had this happen to my 82 rabbit.