You can use rec_name for retrieving a single value. But if u want to display more than one field means go for name_get method

def name_get(self, cr, uid, ids, context=None):
        res = []
        for obj in self.browse(cr, uid, ids, context=context):
                var = obj.name +"Email("+obj.email+")"              
            res.append((obj.id, var))
        return res

Use the above method in your parent class and simply call that class on your manytoone relational field.

Syntax of name_get orm method

name_get(cr, user, ids, context=None)
    Parameters: 

        cr -- database cursor

        user (integer) -- current user id

        ids -- list of ids

        context (dictionary) -- context arguments, like lang, time zone

    Returns:    

    tuples with the text representation of requested objects for to-many relationships

Check many2one relation table "name" column is available. It shows "name" column value in many2one selection or add the below code in python file

rec_name = "fieldname"

Here after its shows rec_name field value shows in many2one selection.

using browse ORM method you can access all other fields.

Example:-

 def meth_name(self, cr, uid, ids, context=None):
      table_obj = self.pool.get('table.name')
      for val in table_obj.browse(cr, uid, ids, context=context):
             field1_value = val.column1
             field2_value = val.column2
      return field1_value