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In Two-Headed Giant, for each attacking creature, the attacking team announces which defending player, planeswalker, or battle that creature is attacking when it's declared as an attacker. Sandswirl Wanderglyph's abilities care only about creatures that attack you or planeswalkers you control, not creatures that attack your teammate or planeswalkers they control.

If Sandswirl Wanderglyph leaves the battlefield on a turn in which an opponent attacked you or a planeswalker you control (perhaps because it died in combat or another player cast a spell that destroyed it), that opponent can cast spells.

If a card that isn't a transforming double-faced card becomes a copy of a card with craft, it'll stay in exile if you activate the craft ability. It won't return to the battlefield.

Once Sandswirl Wanderglyph's middle ability resolves, that opponent won't be able to attack you or planeswalkers you control that turn, even if Sandswirl Wanderglyph is no longer on the battlefield.

You may exile tokens you control as part of the materials required. However, because they aren't cards and won't stay in exile, any abilities that refer to what you "used to craft" the back faces won't refer to anything.

The back faces of some cards with craft refer to cards "used to craft" it. This refers to the cards exiled as part of the cost of the craft ability of the front face. Those cards are considered to be "used to craft" that permanent as long as they remain exiled and the permanent remains on the battlefield, even if the permanent's controller changes or some of its characteristics change (because of a copy effect, for example.)