Among the vital survival items you'll need: 1) this forum 2)Haynes guide 3)good Independent Volvo mechanic. I also suggest take steps to avoid the dreaded rear main seal leak [If you have that leak it will be at the bottom of the block (drivers side) at the joint between the transaxle] Have a look at this http://volvospeed.com/Repair/ftrap.php and if you are inclined you can 1)inspect the hoses and see that they are not all gummed up with oil 2)discard the flametrap if there's one there 3)clean the throttle body and butterfly valve while you're there. One caution is to be very careful with the elbow fitting that houses the flametrap try to twist the large air intake elbow away from it because the small elbow is easily separated and broken from the rigid lines going under the manifold. Post back with any questions. Before long you'll be changing trans fluid and doing brakes.
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'97 855na, Mobil 1, K&N, various IPD's and eBay's