Hi
you can get SIN # in any service canada office...
www.servicecanada.gc.cafind out in that website what is the office nearest you
about applying work permit.. you have to find employer first and apply for LMO
Unless you have a work permit, Service Canada will NOT issue you a SIN. The OP has to find an employer, the employer has to advertise the job on the job bank for 2 weeks, explain to HRSDC why no Canadians/PR were qualified for the position when they apply for the LMO. IF an LMO is approved then the OP could apply for a work permit at a Border Port, if they didn't require a medical. Note the OP could apply for 1 year working holiday visa through Bunac or Swap.
PMM