If I get TONED do I lose weight?

I asked a similar question before, but Iam 5'8 and 155, and I want to lose 15-20 pounds, but I also want to get toned, not buff, not taylor latuner but more like zac efron and john mayer [when he was leaner and toned],i want muscular pecs and arms. Iam considered 15lbs overweight, but if i lift weights and run am i gonna lose weight or gain weight, cuz you always here that muscle weighs more than fat, but you hear those stories of people that LOST 20 lbs and got "muscular and toned" for example John Mayer, in his Rolling Stone Cover he posed with his shirt off and he said he LOST let me say it agian LOST over 20 pounds and got leaner toned and muscular by lifting weights and doing cardio, but if he lifted weights, shouldent he have gained weight????? kind of confusing.................... So basically i want to get toned Toned with arms pecs and skinnier face and lose these 20 lbs, but in order for me to do that i have to lift weights, but if I lift weights do I gain weight or lose weight?????