I believe, but stand to be corrected, that for all those items you have to buy, they can be written off over 8 years. The property itself is a capital expenditure and if and when sold would be liable to Capital Gains Tax (if it is sold at a profit).
Obviously, even if you let the house as "unfurnished", for which there may be an increasing market, you still have to comply with the Minimum Standards for Private Rented Accommodation.
An accountant would be the best person to advise you as there may be other tax breaks available or ways to minimize your costs and tax liabilities.