Get a different cpu block. That one is OK. The EK Supreme HF
is regarded by this site as the best overall block because it has low restrictions and 2nd best temps within .1c of the KYROS XT (best temps, but very very restrictive). The EK supreme HF comes in many colors and it doesn't matter which one you get.
1.since you got 1/2id 3/4od fittings you need tubing that matches those specifications exactly
2. The first reservoir you linked does not include a pump. You would also need this pump
or this pump
to go along with it. The 2nd res/pump you linked is O-K, but it is rather weak.
3. 10 fittings is correct
4.I would get 10ft of tubing just to be safe because you will make mistakes on some cuts. We all do.
5.Just buy distilled water at the grocery store. It works better than all of the fluids except for this nano fluid
which is $30 per liter. You will also need one of these
to go in the loop to prevent microbial build up
6. The reservoir has an opening at the top which you just keep adding more fluid until you no longer need to. You then seal it up and wait a while as it works the air out. You will have to add a little water the first few days once as it works out the air bubbles from the loop. You will then be completely good to go and won't have to touch the loop again.
Hope this helped