I bought a juke (my bad)

This was my first time purchasing a car and I was played like a six string.
The day after I bought it the service engine light came on I brought it to the dealership and they told me it was a small evap leak and then later said there was a torque converter code. They also mentioned something about the exhaust. My dad drove it around and ran all the transmission test and it didn’t have any flags for a transmission issue. I am bringing it to the dealerships sister store at the end of the week.
While we were buying I was able to talk the price down over 6k which is fortunate because that’s the cost of the transmission. If it comes to that. I asked time and time again the dealer assured me the transmission was fine. I am hoping it’s fine. I am sure others have been in this situation before I am just looking for advice.