Citadel paints are fine, though maybe a little pricey, and the design of the pots is annoying - paint's good though really
I do really like the citadel clippers...if I was going to buy any tool from
gw, it'd be that.
...hobby knife and glue, buy elsewhere - find a local hobby shop, there's bound to be a few, and get whatever hobby knife you want really, and some "poly(styrene) cement"/"plastic glue" - I use revell personally...citadel plastic glue is fine, but I prefer revell, it's a little cheaper, and the needle applicator on the revell one has never blocked up on me, unlike the citadel one. For superglue, I recommend selley's quick fix, you can get that pretty much anywhere, and it's the best superglue I've ever used
As for the paints you'll need, if you're going to be painting stormcast, in the standard poster-boy colour scheme, I suggest getting on youtube and going to the warhammer tv channel...there should be some painting tutorial videos from the
AoS starter set, with Duncan painting some stormcast in that colour scheme, should be helpful - and there'll be a paint list at the start of the video too
One paint I know you'll need though, which might not be in the paint list in the video (I think it was released a little later), "Retributor Armour", metallic gold "base" paint...metallic gold paints in general have always had terrible strength and coverage - retributor armour is amazing though!...it does cost more than the regular paints though, but
imo, it's bloody worth it