Hi guys, i recently bought this car 2nd hand (2021 VLT), i would like all sifus to confirm if my car is normal or need to service

1. When i tried to accelerate from T junction, there are throttle lag. There are 0.5-1 second delay until the power kicks in, is that cvt issue or is it my engine problem?

2. I do not know what the sport mode does, it doesn't provide the kick like Ativa when in Power mode. Ativa's power mode had more kick, but almera's do not have any effect, is is my car's problem?

3. what tyres do you all recommend to reduce the humming noise when cruising? Still had the original tyres.

4. I do not owned any turbo car before, is there anything i need to look out of?