Huh? Are you asking these questions while in the process of buying a new car or are you asking them in the midst of some issue with your current car? I recently bought a new car (first one in fifteen years!) and it definitely was a surprise in a lot of ways when it comes to the changes in technology and such. At one point I asked the salesman about how often I should change the oil, as I'm used to the "every 3000 miles or 3 months" mantra....and was surprised when he said, "your car will tell you." Uh...OK..... As far as asking about transmission fluids and such, that is already beyond my knowledge and skill set anyway, so I didn't inquire about that! (The vehicle is automatic, but does have a way in which I can also drive it in Manual, but I probably won't do that. It's a nice feature to have, though. Presumably this has some impact on the transmission and need for fluid, but if so, I have no clue one way or the other.). In the end I arrived at the conclusion that my new car is smarter than I am and indeed she will tell me when she needs some sort of maintenance done. In the meantime I'm sure enjoying driving her!