In an Audible Voice
Question :

Do we have to recite takbeeratul-ihram in an audible voice?

Answer :

One should recite takbeeratul-ihram in an audible voice for all prayers; in such a way that one can hear himself if there were no obstacles.

Raising Hands During Takbeeralul-Ihram
Question :

During Takbeeratul-Ihram, is it obligatory to raise my hands?

Answer :

It is not mandatory to raise the hands, but it is recommended.

Takbeeratul–Ihram
Question :

Is Takbeeratul-Ihram obligatory in the beginning of every prayer?

Answer :

Yes, it is a fundamental part of every prayer.