How much is VAT and tax for importing a computer for personal use?

I need to buy a computer from my home country in Europe (computer and a mobile phone), and wonder how much VAT and other taxes are? I will only use the computer for personal use, but it will be invoiced to my company, registered in Hong Kong.

If I instead order it to Hong Kong and go there and pick it up, can I bring it with me to Taiwan without having to pay any VAT or taxes (how old must the computer be for it to be tax exempted)?