If you are traveling to Turkmenistan with Canadian passport in most cases you do not need to obtain entry visa to Turkmenistan at the consulate beforehand. The period of stay though may be limited by the laws of Turkmenistan. You may check what is the allowed period of stay at the Turkmenistan consulate in Canada. All other applicants should check information on Turkmenistan visa requirements, procedure, application forms, fees and processing timings may be found here: http://turkmenistan.visacenter.ca.