If it's your first rif, my advice is listen to those who have added their insights & possibly take a breath & wait for those items to appear in the classifieds, it could well save you a lot of £££.
My own insight is you may well find that you don't like using a tracer, or a suppressor, or a fore grip etc...
I say this because they do get advertised fairly regularly for multiple reasons.
I've found I like the 'looks' of all the accessories you've listed but I don't like lugging the extra weight, or longer barrel, a sling can get in the way, or how a tracer lights you up in the middle of a game where sneakyness is worth it's weight in camo.
Yes, you'll need a/some batteries & a good charger.
You would be better spending your £££ on mags, bb's & something to carry them.
DON'T FORGET comfy boots & good eye/face protection (far more important than looking uber cool).