Buying a used Audi R8, how do I check the gearbox before I pay?

I found a used Audi R8 that is about eight years old with around 40,000 km, and I am very close to buying it. The seller seems honest and the car looks clean, but the gearbox worries me, because every forum and video I watch says something different. Some people say it is fine if you take care of it, and others say one bad repair can cost more than a small car. I looked for a professional guide to Audi R8 transmission performance and maintenance, but most pages were either too short or too hard to follow, so I thought I would ask people who really own one. First, which gearbox does my car have? I know there is a dual clutch type and a manual type, but I do not know how to tell them apart from the ad. Is one safer to buy than the other, and which one is cheaper to keep over the years? Second, what should I check during the test drive? Is it normal for the shifts to feel a little rough or slow when the car is cold, and should it get smoother after ten minutes? What about a small shake when I pull away slowly, or a clunk when I park? How do I know if the clutch is worn without taking the car apart? Third, how often should the gearbox oil be changed? The seller says it was never needed, and that sounds strange to me. Does the hot weather here make it more important, and what does it cost when done properly? Fourth, can a normal garage read the fault codes on an R8, or do I need a specialist with the right scanner? Is it smart to pay for a full check before I buy, and what should that check include? Should I ask them to look at the gearbox oil, the clutch, and the software history? Fifth, what papers should I ask the seller to show me? If the service book is missing or shows nothing for a few years, is that a reason to walk away? Sixth, how much does the way I drive matter? Does stop and go traffic wear the gearbox faster, and is hard launching really that bad? I would like to enjoy the car, but I do not want to damage it in the first month. Is it a bad sign if the car sat unused for long periods? I heard that can hurt the clutch and the electronics, and I do not know if that is true. Lastly, what should I plan to spend in a normal year to keep the car healthy, not counting fuel and insurance? My family thinks I should buy something simpler and not stress, but I keep thinking about this car every day. If you own or used to own an R8, please tell me what went wrong, what you paid, and if you would buy it again. Even honest warnings or bad stories will help me a lot. Thank you for reading.