@bullseye
yes the rx-7 type R (FD3S) is a good car ^^ just be careful about hitting the walls because the boost lag can be a real bummer (especially for option B); but otherwise, it's a pretty good car. i'm gonna get one myself when IDAS (ver.4) comes out ^^
@P.R X01A
i'd suggest the trueno
@Konker123
the s2000 is pretty good in usui. its top speed is pretty good and since it is an FR, it drifts pretty nicely ^^ the 1st usual technique is to shift down before you reach the turn, brake, release and accelerate (shift up) as necessary. the 2nd technique is to brake while taking the turn and then downshifting when you reach the apex - both are "slow in, fast out" techniques but like Noire said, just experiment which technique works for you

i can also suggest practicing the "eraser" - shifting down, then quickly back up (you should hear a short "t'ks-like" sound) WHILE TURNING; this will initiate a drift, so you can take the turn without losing speed. try it on usui counter-clockwise, on the 1st lap, 1st turn and C-121.
(re: startup shifting)
try shifting to the gear at the given rpm:
2nd = 6000
3rd = 6200
4th = 6750 or 7000
5th = 7200
6th = 160+ on myogi; 155+ on usui; 144+ on akagi, akina, tsuchisaka; 130+ on irohazaka, akina snow; 135+ on happogahara; 105+ on snomaru
(re: parts & points)
yes it will take off points - you should be able to see how much at the lower right. you can get your old part back but it's a bit random and as far as i know, you'll get it more often if you do a lot of time attacks and battles.
@PinoyHustler
(re: Bunta car)
it's just the car ^^ there are no tuning options, though, just N-tune or normal tune. it is, however, one of the best cars to use in wet conditions.
(re: RX-8)
yes the RX-8 is a pretty good car, both in dry and wet conditions ^^ unfortunately i don't have one so i'm unable to recommend which option to choose or parts to buy
@N0_NAM3
the number doesn't really affect the car's turning but the higher the value, the harder it is for you to turn the wheel. so it's really just your feel or preference how much resistance you'd want

presonally, i prefer the simple display because i'm not distracted by the numbers and i get a somewhat larger view of the screen ^^