for valves, you can get them from superstar quite cheap.
you may need tape to cover the spoke holes. you do on the stans rims.
i usually fit the tyres with tubes first and inflate to a fairly high psi and leave for a night. this gets the tyre into shape nicely and makes it easier to get them set up tubeless. this is not essential however.
when setting up the tubeless tyres, i usually mount them fully, use a compressor (sneakily at a garage) to blast them up to about 35psi so the beads pop into place, and then deflate fully.
i then chuck a tyre lever in at the top and prise the tyre upwards so i can squeeze the sealant inside the rim. the sealant will then run down the inside of the tyre and collect at the bottom.
as the remainder of the tyre should be properly mounted (as you inflated it just previously), it will not leak out everywhere.
once the right amount is in, i take out the tyre lever and then simply inflate the tyre. once inflated, you do all your shaking and spinning to get the sealant around the tyre and seal any air gaps.
the above method is great if you are not inserting the fluid through the valve stem.