well, just eat generally healthy, lots of fruit and veg etc. im sure youve heard it all before, otherwise google. drink 8 glasses of water. you dont need equipment but if you think it will help you stay dedicated, buy something fairly cheap like dumbells.
if youre really serious about fitness, and "getting ripped" wake up to situps, they are the best for abs. Do at least 30mins of cardio 3 days a week. on the other 4, vary weights, push ups, situps, crunches, dips, squats, pull ups etc. for strength training.
good luck :)