I have a beagle.. He's 3 years old, Is there anyway I can train him to behave outside?

I have a beagle named snoopy. He's 3 yrs old. He never listens to me outside. He walks horibbly on the leash. He barks and growls at other dogs. He doesn't listen to me when I call his name. He maybe getting too old, But my friend managed to train her 4 yr old beagle! I never asked cause a year later I got mine, and the same year ehrs ped away. And she says she forgot, and dislikes talking about him. How can I train Snoopy to walk good on a leash, listen and the other stuff i asked ^ ^ ^ ^ ^?????