Mosfet use to make boost converter
The gate threshold voltage is a relatively meaningless number for designing a switching circuit.  The important number is the gate voltage at which the RDSON is specified.  For some low voltage, sometimes called logic level MOSFETs, that can be just below 5 V or even just below 3.3 V.  For most ordinary MOSFETs, the RDSON is specified at 10 V or so.  12 V is therefore a common value to drive the gate to.  Higher is fine, as long as it does not exceed the maximum allowed gate-source voltage.  That's often in the 15-20 V range.

A resistor is sometimes used in series with the gate to allow a little local negative feedback around the FET at high drain slew rates.  This limits the drain voltage slew rate, preventing undesirable effects inside the FET.