For those of us that have yet to receive GT-6 ..... Would the SNAIL Trail Blazers put together a list of Suggestions and Advice? Reading the thread is a long patch-work of experiences. Hope you will consider the request. (Of course I could just take notes like a good student.)
I have been running SNAIL settings so far, Tex. Start in Novice class - the Fit you are required to begin with is fine here for all races. If you win a MiTo 1.4 it is a mite more powerful, but you won't need the extra.
Make sure you take the National B License when it is eligible in Novice class. 5 events, easy. Go for gold on them - again, easy - and you can 'kart' away a 'junior sized' prize.. Know-what-I-mean-Verne?
Same thing in National B, the second step up. Win 7 races, then do the National A license. That opens up Online racing. I was playing around with the Focus and FRS and both throttled competition at 445 ish PP when the max allowed was 500 PP. Even a 410 put a wallop on them.
Getting Gold on all mission races (a subset inside the category) gets extra bonus cars. Bonus cars are less frequent than GT5, but make more sense cost/PP so far. You win one car for winning all the events in one category, not one car for each miniseries and an extra one for finishing all of them. [Just finished all the National B races, a decent bonus car - not crazy high]
Once the moon mission opens up, it is a fun 'rally' course - 50,000 credits, non-repeatable, for 3 different races.
Watch the Vision GT movie for a free car.
I did not need to buy any cars to compete (Japanese '90's is not in anniversary pack). You can win easy and SNAIL-clean well below the max, or even suggested PP. Once you get to the National A races, you may need to buy cars, but that is well into Career land. National A opens when you are less than halfway through National B.
Economy seems slower to increase. Prize money escalates slower than GT5. If you want modified parts, some are much more expensive than the GT5 counterpart.