With this, you'll need to get all the non-DLC cars from the Peugeot and Renault dealers.
2007 Peugeot 207 RC (9,500c)
2004 Peugeot 206 RC (10,000c)
2007 Peugeot 207 Super 2000 (102,500c / win 300HP Invitational [Semi-Pro])
1993 #3 Peugeot Talbot Sport 905 EVO 1C (300,000c / win Sebring Grand Prix [Endurance])
2003 Renault Sport Clio V6 RS (30,500c / win Hot Hatch Runoff [Proving Grounds])
So, that'll cost you anywhere from 19,500 to 425,500 credits, depending on whether you want to unlock them instead of buy them.