A few suspicious things with my car?

Hi I have a 1987 Plymouth Reliant K and I havnt had a need to drive it this winter but ocasionly i've started it up and have had rediculous white smokey exhaust thats rather intoxicating. More recently I looked under my car to notice what looks like sludge puddles 1 under my engine didn't look to see exactly which part it was under and 1 about a foot away from my rear left wheel. It's been in my car port the whole time has only had some snow on the trunk and front bumper from the wind. Theres also old burnt oil I think on my engine block but seems very old so probably not related.