If you decide to buy a vice (Monk- shut up) don't buy anothing expensive. I have an old Indian made vice I bought in SA for ?5 and it has lasted me nearly 35 years. Before that I used a pair of grips which I put into my Dads bench vice in the garage.
On top of that you need a decent pair of small scissors, a pair of hackle plies, a dubbing needle which you make by sticking a large darning needle by the blunt end into a bit of wood and maybe a bobbin holder. I use several bobbin holders these days with different coloured tying thread on each, but this is going over the top.
For many years, I used to let the thread hang in an old bit of eraser with a slit in it.
To finish the fly you need to learn the whip finish knot. There are allsorts of complicated tools you can buy to do this.
Load of b.....ks!
I do it by hand in less than a second.
After this, all you need to do is collect materials. For feathers, a full partridge and pheasant skin will keep you going for years.
Don't for goodness sake waste vaulable cash on what are termed: "Genetic Capes".
Another load of b.....ks
Ordinary Indian red, black, cree and other colours are fine.
I tend to use cheap hen hackle on dry flies these days. They sit better on the water.
Have fun.