I was going to change my oil and came across this. Looks to me like red Transfer Case fluid.
To all 14,15,16 4Runner Trail owners I would recommend you to check your Transfer Case to see if it has any fluid leaks like mine. I traded in my other vehicles because of problems like this. Ford, Chevy, Dodge, Jeep and now this! So Sad.... So Sad.
Revised!
It's Transmission fluid that is leaking. It's not from the Transfer Case. It looks like it's coming from the end of the Transmission where the Transfer Case bolts onto.
My 4Runner has 12,800 miles.