You should be able to do a direct swap with no other parts required. The "Husky Bikes" stem does not specify a clamp diameter, but I would give a 95% chance that it is sized for 25.4mm, which is the mountain standard.

This is one long stem. I hope you want a very upright riding position.

As far as the rest of the bike, apply the standard used bike checks, including testing if the stem and seatpost are corroded tight into the frame and whether the suspension fork is clapped-out. Assume that the chain and cassette are worn out. I have fixed up dozens of used bikes and I have only ever come across a single one in which the chain did NOT need replacing.