are nice because they do not require continuous power to hold state.
Both single coil and dual coil are easy to use. Without extra circuitry beyond the always-necessary driving transistors or MOSFETs.
Both types, using just the driver transistor(s), would need two output pins.
With a two coil relay, each coil uses a regular MOSFET or transistor circuit.
For one coil, this ugly circuit will work, but you can do better at the expense of a few more parts.
Latching relays need a certain pulse width to reliably switch. With the circuit I posted, it would be best to keep the energized time to just that short, typically 5 milliseconds or so.
a7