the truth is that there is no easy fool-proof way. what you're looking for doesn't exist, because each person is different (different body type, different metabolism, different starting points, different motivations, different goals). there is fitness science, and proven methods, but the challenge is finding what will work best for your individual situation. none of us can tell you what that magic combination is, because we don't know you personally, you have no pics or stats, and it would be irresponsible to advise you without that information.
1) Join a gym that's nearby to where you live or work - so you have no excuse not to go! You have to commit to going, even on the rainy nights, the cold winter days, or sunny summer evenings when you just want to down a bunch of beers and eat burgers.
2) Hire a personal trainer for a short time - not just the biggest guy in the gym, but a professional who you feel comfortable with. Discuss your fitness goals frankly (e.g. i want to look good naked, i want to lose the spare tire, i want to have awesome arms, i want to run a marathon, whatever). Get them to create a 3-4 day per week workout plan for you and supervise you for a week or two, so you know the routine, the machines, the exercises. Then you go off on your own to follow the workout plan for the next 2 months. Schedule a follow-up meeting with the trainer after the 2 months to assess your progress. Adjust the plan if necessary.
3) Consider a nutritionist/dietician if you need some help with big weight loss goals.