Holy fuck at least inform yourself. FM is the system through which you are able to unlock some stuff like alt. colors, stages and story costumes. If you've been playing every now and then and bought the season passes, or at least one of them, chances are you've amassed enough FM to buy all the stages released so far (excluding the premium CPT ones), also, you're not meant to have every single costume in this game unless you're ready to shell out a couple hundred bucks, some they've been releasing several costumes during SFV's lifespan, so putting all those costumes in the $40 package that is AE is simply not possible unless you want them to release a pricier product. If you are jumping in for the first time then you'll be able to gather quite a lot of FM by playing with all 28 characters, doing their stories, trials, easy and medium survivals (pretty doable even if you can't really play the character), and there's the general story mode (80k FM in total) plus weekly missions and whatever new ways of earning FM that Capcom will be implementing.