Hi Arthy!!
So on your way to Spore eh? :) Nice. Applying for visa to spore is a fairly simple procedure as long as you have all docs in place you shdnt have any problems at all. The visa procedure is transparent and everything is stated in the Spore Immigration website given below:
ICA - Visitor Services
I think either you or your brother can apply for tourist visa online itself, i.e assuming you need a visa- depends on how long are you planning to stay in Spore. From what I know, if you are in transit via Spore, you can legally stay in Spore for 96 hours without applying for a visa. This is applicable ONLY for people holding a valid working visa in any of thse countries - USA, Australia and Newzealand. Anything beyond 96 hours, you will need a visa.
Have fun in Spore and gear up for the sunny island of Singapura. :) I spent a good part of my teens in Spore, so I have a fair idea of how things work in Spore. Its a small country but well maintained and cosmopolitan.