Furnished means fully furnished and they will have photos for you. Partly furnished means it has a kitchen and bathroom. Unfurnished CAN mean that there is no kitchen! Here you pay rental but for tax reasons the landlord breaks that down into rental + hire of furnishings (Kitchen, bathroom, built ins).
You can also get unfurnished condo
and then hire furniture. Then you get to chose.
But really, it so so cheap to do the Ikea run. Fully furnish a house for $2000.
One option is to hire beds but buy rest from Ikea.
Most hire contracts mean that at the end of the contract you are considered to have purchased the goods and for a small fee (often only $50) you can keep the goods. Then you can offer them on ebay or though expat auctions. Expat Auctions can clear most 'good' stuff. They get good prices for 'signature' pieces - often more than you paid for them retail.
Often people come to Singapore, do the ikea run and then get a few oriental type pieces as accents. These often get taken back with you to your home country to remind you of your time here.