K313 cvt will be written on a cvt corolla. There is no oil gauge for a cvt transmission car, and you will find gauge for old 4 speed transmission. Cvt gear in console have P, R, N, D, M+/- which is a tiptronic.
How much mileage you wanna put on your car?
I have a 1.8cvt rolla and I have covered 175000kms, and it will last with the same cvt as long as it's with me.
Just a regular oil change by the book and you're good to go. Plus I stop car completely when I want to change gear from D to R. Also, when ever I am parking my car I put it in neutral, pull the handbrake, and leave the brake. Then I move the stick to P. One should do it in all auto transmissions.
Get a cvt tranny one. You will love a very smooth drive with very good power delivery and fuel economy. I still get 11-13 within city and 15-17 on long. That's for 1.8, I have heard 1.6 cvt does even better then that.
Always perform service from dealership, don't fiddle with your car and it will last a decade. My car is 7 years old, and Alhamdullilah still running strong.