So just wanted advice is anyone had been in q similar situation

I brought a car on the 12.01.22. I brought it from a dealership as I thought they could be trusted and I wouldn't need to worry as much in hope I would be in good hands. I paid just under £10,000 for the car that was described as in perfect condition. Upon driving it home I could hear noises from what I thought was from the engine. I called him within a few hours and he started getting annoyed with me how he regretted selling the car as he had other buyers that wanted the car but he gave it to me and how someone paid a deposit but he gave it to me etc. I actually felt pressured in buying the car the way he was going on and on about how popular it was.
Anyhow the same day the car was brought he told me if you think there is an issue take it to a Toyota dealership or my mechanic. Since his mechanic was a whole hour away I took it to a Toyota dealership the next of being the car in which they inspected the car and said the car has all in all 13 items requiring immediate attention in red flag. The car was deemed as unroadworthy by Toyota dealership mechanic as the car has a wheel with lots of cuts and another wheel that has no thread and another very close to the minimum limit as well as other issues such as the catalytic convertor being non genuine and having a faulty o2 sensor taped which was one of the reasons the car was not picking up speed and fuel consumption was high. I shared the report with him and he accepted the liability for the wheels and for the o2 sensor and the handbrake and said he will get his mechanic to sort it. I told him I do not trust him since he made an allegation that I was asking about his race and his skin colour which is nothing but lies that he later admitted to being confused with someone else. I explained I do not trust him and I accept a repair only if it carried out by Toyota dealership and not him or his mechanic since they have already falsely advertised the car. He refused and said to take it to small claims court. I basically either wanted a refund or the repairs fixed by Toyota dealership or at least the catalytic convertor fixed by them and the rest I would have allowed him to do.

I had sent him one notice about my consumer rights about rejecting within the 30 days I then sent another letter and email and then gave him the option of sitting with a mediator which he again refused and I myself contacted the motor ombusdman and they said they couldn't help as he was not accredited.

I finally had no choice but to fill in a small court money claim today on 14.01.22 just 2 days after buying the car and I was wondering how often these claims are actually successful and do I actually stand a chance?