If they can get here obviously they are more technologically advanced than we mere humans and just as likely to have developed a Universal Translator (
Universal translator - Wikipedia, the free encyclopedia) so understanding English or any other Earthly language will not be a problem.
They obviously will be placed under government control and likely given orange jump suits and maybe a home in Guantanamo Bay since those residents are currently vacating the facility (i think Obama said he was closing the first day of office?). Longer term they would be assimilated into one or more societies found on Earth.
As for relying on government handouts, they will likely come bearing some form of valuable currency (don't stay focused on things such as the dollar) for barter that will far exceed the value of any currency on Earth, remember the movie "The Day the Earth Stood Still" relied on diamonds?