Never use a kit that tells you that you can just drop a tablet in it to fiz all of the problems! It does not work, if it did everyone would be using it already.
1) No offense meant by this but get over the cloudy, lol. IT happens in every tank, it has to in order to establish a natural cycle. If your tank is below 5 gallons then yeah clean it immediately and this is a sign that a) get a bigger tank or b) you have to clean it a lot more.
2) Unless your betta shows signs of ditress then leave him/her in there. Cycling has to be done and with the Btta in there it will be a lot faster. Simply do 50% water changes every other day in a smaller tank. In a 20+ do 50% twice a week. You will see, with fish in there, cycling takes about 2-4 weeks. After it is cycled it is crystal clear and you should have no more cloudy problems as long as you syphon once a week.
3) When it is no longer cloudy your battle with amonia is done. Welcome to the war with algae