Hi Zoe, welcome to Gaire.
Alot of the advice you got here is prity good.
Clothes wise, yep Heatons, Dunnes and Penny's all very cheap and handy where you are trying to work out your sizes. Ebay prity cool, but remember the US sizes are different sizes than Irish sizes, you will find a comparison chart on line by just googling it. Other online shops that do bigger sizes if you need them, particularly in shoes is Oxendales and Simply Be. (They do a wider shoe, which some guys need) they are a little bit more expensive as shops.
Wigs I can't help you on, I'm afraid but sounds like good advice here, mess around with a couple of styles and colours, cause sometimes, depending on your colouring, certain colours look completely off.
Hair removal, Electrolysis and laser technology are the only permanent, hair removal and you will need to go to a clinic for them. I was doing IPL (a form of Laser) and the beautician where really cool.
Others are Waxing, tweezers and shaving, hair removal cream is the same as shaving, (but never use them on your face as more than likely you will end up with a rash or a burn. A close shave should do the trick on your face anyway.
Make up, I've prity heavy stubble, I generally use a shade or two lighter cancealent (than your own complexion) on the dark bits, and then use a foundation the same colour as your complexion. Experiment with the other stuff, and if you do a search on youtube you can see videos in how to apply it.
I hope this is of help, Enjoy and have fun with it.