I just got a new USED car from a private seller for 7200, the specs below:

Year/Make/Model: 1999 ACURA INTEGRA LS

Body Style: HATCHBACK 2 DR
Engine: 1.8L L4 PFI DOHC 16V
Fuel: GASOLINE
Driveline: FRONT WHEEL DRIVE
Manufactured in: JAPAN

It's a 5speed and I was wondering how much would it cost to switch it from a 5 to an Auto because I have a bad knee/surgery. Also, did I get a good deal, it has 65k, it's silver, and new paint job, intake, and new CD Player via Sony. This is my first Acura and it seems to have low power as well. Also, how could I make it faster?