If this is your first cycle, stick with the test cyp and consider adding EQ next time. Its going to take 4-5 wks to really see how the cyp effects you, as the long ester builds into supraphysiological levels. At that point, you'd need another 5-6 wks before the EQ would really build up, if you started EQ at that time. If this is your first cycle, there is no need to take more than test. You can only gain so much muscle at one time. Adding more gear isnt going to make it 2x as good. If you have a headache, and take an asprin, then the pain goes away, taking an advil isn't going to take the headache away anymore than it already has been. You just increase the chance of side effects. So add the EQ in your second cycle and yes, you can mix them in the same barrel.
As for your adex question, everyone is different and has a different level of conversion to estrogen. If you are doing 2cc EW, 2-3 .5mg doses of adex should be plenty. You may even want to take around .25mg EOD