You are 16 and young and quite wealthy. A Lotus is not the best approach since the car has a Toyota engine and the manual can be a hassle depending on the area you live in. Also the car has as many luxuries as an airplane bathroom. They're better options than buying a Lotus. For 80,000 you open the door to many potential vehicles and at this budget, you can buy almost anything car new and used. Here is a list of cars that might spark an interest:
New Cars for Around 80,000:
2009 BMW M5 (RWD 0-60 4.5 sec) $86,000
2009 Mercedes-Benz CLK 550 AMG (RWD 0-60 4.7 sec) $65,000
2009 Mercedes-Benz SLK55 AMG (RWD 0-60 4.5 sec) $65,000
2009 BMW Z4 Twin Turbo (RWD 0-60 4.9 sec) $52,000
2009 BMW 750Li (RWD 0-60 5.1 sec) $81,000
2009 Mercedes-Benz C63 AMG (RWD 0-60 4.5 sec) $58,000
2009 Cadillac CTS-V (RWD 0-60 3.9 sec) $60,000
2009 Lexus IS-F (RWD 0-60 4.5 sec) $58,000
2009 Chevrolet Corvette Z06 (RWD 0-60 3.5 sec) (#1 Best Buy) $76,000
2010 Ford Mustang Shelby GT500 (RWD 0-60 4.3 sec) $57,000
2009 Porsche Cayman S (RWD 0-60 4.3 sec) $61,000
2010 Nissan GTR (AWD 0-60 3.5 sec) (#2 BEST BUY) $82,000
2009 Jaguar XK-R (RWD 0-60 4.3 sec) (#3 BEST BUY) $88,000
2009 BMW M3 (RWD 0-60 4.3 sec) $57,000
2009 Porsche 911 Carrera 997 (RWD 0-60 4.7 sec) $75,000
AND MANY MANY MORE!!!
HOPE THIS HELPS!!! (There are more cars in the used category in your price range that are way better than these but I am guessing you want a new car)