The issue you can face here is in terms of the language of communication. Although most drivers can speak English, you'll hop inside to test it out beforehand. Please tell them your hotel name and give them some guidebook, if possible.
There are two types of cabs you can get in Singapore.
The basic taxis available 24 hours a day, except on Sunday. Many of Singapore 's renowned car transportation services include Premier Taxis, Comfort or Citycab, Transcab, SMRT etc.
The Limousines and the Chryslers are a little more elegant and comfortable and offer you a sumptuous homelike ride and ease. Also in the midnight, these limo hire companies have 24x7 ride and they are conveniently accessible because you don't have to wait in the queue, but just a click is enough. Though these cars are less costly, they have enough space inside to make it easy for your family and the luggage to fit in.
Check http://www.maxicabssingapore.com for more details.