Question No.1
Jesus said: "I and the Father are
               one" (Jn.10:30), therefore, is not Jesus the 
               same, or, "co-equal" in status with
his Father?
Answer No.1
In Greek, `heis' means `one' numerically (masc.)
          `hen'  means `one' in unity or essence (neut.) 
Here the word used by John is `hen' and not `heis'. 
The marginal notes in New American Standard Bible (NASB) reads;
one - (Lit.neuter) a unity, or, one essence.
If one wishes to argue that the word `hen' supports their claim 
for Jesus being "co-equal" in status with his Father, please 
invite his/her attention to the following verse:
Jesus said: "And the glory which Thou hast given me, I have given
            to them (disciples); that they may be one, 
            just as we are one." (John 17:22).
If he/she was to consider/regard/believe the Father and Jesus Christ
to be "one" meaning "co-equal" in status on the basis of John 10:30, 
then that person should also be prepared to consider/regard/believe 
"them" - the disciples of Jesus, to be "co-equal" in status with
the Father and Jesus ("just as we are one") in John 17:22.
I have yet to find a person that would be prepared to make the
disciples (students) "co-equal" in status with the Father or Jesus.
The unity and accord was of the authorized divine message that 
originated from the Father, received by Jesus and finally
passed on to the disciples. Jesus admitted having accomplished 
the work which the Father had given him to do. (Jn.17:4)
Hot Tip:   (precise and pertinent)
Jesus said: "I go to the Father; for the Father is greater than I."
(Jn.14:28). This verse unequivocally refutes the claim by any one for
Jesus being "co-equal" in status with his Father.