You could use your old hdd (if it is of a reasonable size) for storage, you might also use your old dvd drive, card reader, tv etc. Depending on how old your stuff it you might need some ide to sata adapters.
http://pcpartpicker.com/p/4mDY8d
Knocked the price down a notch and added a case
The mx 100 model is new budged ssd and a bit better for the price than the old ssd you had in there. If you cant use your old hdd get a larger ssd instead or another hdd for mass storage.
the fx 6300 will perform pretty much like a 8350 in games if you get it to the same clock, I assume you will overclock
I upgraded the mobo a bit, you should get the 6300 to 4,5 with that setup.
I changed the gpu to a r9 290, that specific model is really great and you lose minimal performance for 100$ saved.
Different psu because rebates
some extra fans for cooling
Thats about 800 for the pc without rebates.
about 100$ for a recent windows version if you cant get it cheaper or for free
that leaves you with around 500 $
Proper gaming mice are around 50$ (go to a hardware store and pick one you like/is confortable). A regular 10-20$ one will also serve you well though.
Membrane keyboards are mostly pretty similar, you can just grab some logitech thing for 10$, spend a little more for something with backlight, hotkeys and so on or go for a mechanical one. Mechanical keyboards start at 50$ and and at who knows where. As with the mouse it is mostly a matter of preferance.
For now you can just use what you already have if it is not broken.
That leaves you with 300-500$ for a monitor. Again, its a matter of preferance here. I like large ips displays with high resolution, some like high refresh rate monitors, some dont want a monitor larger than 24 inch, some want a 16:10 or 21:9 aspectio ratio monitor instead of the regular 16:9. With you budged you can pick what you like except for a few super high end models.
Speakers: No idea, I always use headphones. 100$ should get you decent ones I assume.