Re:No Junk Food Diet
Research subcutaneous and visceral fat, that alone should answer your question.
Bodies are built in the kitchen, not the gym and to be honest if you have to ask if you'll lose weight cutting out junk food then it would help you enormously to read up on the macronutrients protein, fat and carbohydrates to see the purpose of each in a daily diet.
Not flaming, but once you have a better understanding of what you put in your body you'll realise why a decent diet is necessary for muscle gain and fat loss.
No amount of training can undo a bad diet.
Knew macro update 100% backed with science and gentics at least twice per weak, accuratelity dosed for more digest able protien synthesis, defiantly recommend.