So true, years ago when I was young & naive, I bought a used ranger from a Toyota dealer. The loan they got me (I had good credit) turned out to be a rule of 78 loan type where they get all the interest up front, it does not matter if you pay it off early or not.
So, I learned some valuable lessons,
1. Always read what you are signing,
2. Never trust a Dealers Finance person
3. Never buy a Toyota (yup, I blamed the mfg. since that dealer represents them as far as I'm concerned.) Never bought a Toyota, won't even look at them, I guess I'm a spiteful SOB when it comes to getting screwed...