Thanks for the response Cooper30... Here in Northern Nevada we routinely get down in to the teens at night this time of year and the days may not get out of the high 30's/low 40's but where this 4Runner is 32degrees overnight this time of year is cold.

I asked the owner if they took short drives and at first he said no but when I told him what I found he said they do drive down the street a lot to take their dogs to the park but this time of year their temps during the day routinely get in to the 60's and low 70's(especially this warm year) so it's not what most would call cold. The owner also said he just had the oil changed at a Jiffy Lube 3 weeks earlier and they top everything off so this car has gone through all the coolant in that period of time. I could potentially explain either low coolant or the oil/water mess under the oil filler cap but the two together seem more than a coincidence.