i am developing a application  in php from which i get data using odbc dsn from mas90 and now i want to update or insert data in  products label in salesforce.

i got a link regarding it 

http://www.salesforce.com/us/developer/docs/api_rest/Content/dome_upsert.htm

http://www.salesforce.com/us/developer/docs/apexcode/Content/apex_rest_code_sample_basic.htm

http://www.salesforce.com/us/developer/docs/api_rest/Content/quickstart_oauth.htm

but from where i will get token to access data AS i dont have customer email id to get security token.

which method i should use to do my task .

please correspond to it shortly 

Thanks