hybrid cars for 800 or less cc engines

 I am a doctor by profession  but reading about fuel prices and pollution got me in this

i use a electric scooter for last two years and its fine for my daily work as well as for my part to keep earth clean

i want to ask if i put a calcium calcium battery to run a 1000kg gross weight car with a800 cc petrol engine

firstly what battery power i need

secondly at asteady speed of 80kmph will the dynamo can recharge the batteries sothat the speed can be maintained