I'm afraid it is not possible to run Astoria on TC70 (i assume it was not MC70 ) with Windows 10.
Couple of reasons
1. Astoria supported device list is currently limited to MSFT Lumias
2. Windows 10 version for TC70 is different from what you have on Lumia. Completely.
Also the project itself seems to be suspended on MSFT side.
Having all that said may I suggest to go Android for Android apps? It is time proof that native works best.