あなたが話しているoauth_tokenは、ユーザーのaccess_tokenでもあり、まったく同じである必要があります。
/ me/permissionsへのGET呼び出しを行うことができるユーザ権限をチェックするには、以下のようなデータ配列を返す必要があります
{
"data": [
{
"installed": 1,
"read_stream": 1,
"manage_notifications": 1,
"manage_pages": 1,
"user_likes": 1,
"user_activities": 1,
"user_interests": 1,
"user_photos": 1,
"user_about_me": 1,
"type": "permissions"
}
]
}
Depending on what the other data you wish to access you will need to ask for more permissions and then call the appropriate API end points. For example to get the users basic information make a call to /me
or to get a list of their friends /me/friends
You can find all the permissions you can ask for at https://developers.facebook.com/docs/reference/api/permissions/
And all the information about where to call in the API for retrieving the different bits of data you require here https://developers.facebook.com/docs/reference/api/