Dealer ship is expensive and sellers don't exactly...

Dealer ship is expensive and sellers don't exactly know what they're talking about. Asked my guy what the different drive types (sports, normal, casual), and he said it's all about preference of handling. My brothers told me that it changes when the engine shifts gears. Nice enough though, and we're willing to at least work with me to get me a car. Young and limited credit with no co-signers.