Probably not the best time to visit the high alps. Too late to ski and too early to hike. But if that is your window of opportunity, so be it. Matterhorn is a long way from Luzern. Hate to go all that way for a day trip and have it socked in. They film those spectacular videos on perfect days of course. So stay flexible with your plans and keep an eye on the weather. Who knows, it could be perfect.
If you think you will have more than 240 chf of train tickets for each adult, the Swiss 30-day Half Fare Card will save money. You can get a free Family Card and your daughter travels with you free. The card is 120 chf per adult. Swiss Passes are outrageously expensive IMO, and they still only give 50% off mountain excursion trains, and in the case of the Jungfraujoch, only 25%.
I assume you will be arriving on the TGV in Zurich, then change to the train to Luzern. So get the Half Fare Cards at Zurich station when you arrive, then everything will be half price.
Zurich is expensive (what in Switzerland isn't) and it is easy to get to the airport or main station quickly from Luzern, so you might give it a pass unless there is something special you have in mind.