Get what you need when you need it, you are new to this and you may decide you aren't as into it as you think you will be. There are various places to get supplies and equipment from, Amazon and Overstock.com have a lot of things cheaper.
Sewing armoires are very practical and a great way to integrate into a working living space.
I could write a book on this subject, and it would be best for me to stop now before I launch into a long list.