on a supply front it might be easier to buy as much of it from one place, Games workshop will sell all the paints you want and I find their quality good, glue you will be better off going to a hobby store and buying it there (Games workshop glue is terrible).
A quick run down to get started is
your required paints (including washes, base colours, ect)
a few brushes, one larger , one medium and one small
plastic cement (plastic glue)
super glue (for resin/metal/finecast models.
a water tub (for paint water)
a good place to paint (an old desk is good or put a protective sheet on a table)
light source (small lamp (helps with seeing what you are doing))
a sharp hobby knife (Stanley knife or exacto knife)
a file (a nail file will work fine)
this is a good start and most will be cheap or allready avaliable like the light and the water pot, any questions feel free to
PM me and I will also check this thread too
hope this helps