No. Nokia 105 does not come with the earphones in the box. You need to buy them separately.
Oh yes, Nokia 105 has 2 variants - Single Sim & Dual Sim. So naturally, the dual sim variant does support dual sim.
Yes, Nokia 105 does have the FM radio.
Yes, Nokia 105 does support the Gujarati language. In fact, it supports 12 Indian vernacular languages.