1 yes your case should have screws for the HDD.
2 yes your mobo will come with the screws and raisers, as long as it is not oem ( which yours is not)
3 yes your psu is really nice. not the best but fine for what you need.
4 i would suggest ( if you can afford it) you get one or two more fans for that case. its a good case, it just needs a couple more fans.
5 do you have an OS?