You can do it easily with what you have. Use articulations–the diamond is the violin harmonic symbol, enlarged. Then you would need to create articulations for a ledger line, a natural, a flat and a sharp. If you learn to use articulation metatools it goes very fast to put them in, but wait till your layout is totally finalized, since they will migrate around a bit if you resize the page or move systems around. I use the measure tool’s beat chart to slide beats when I need to make space for a lever change among the notes.
Pedal markings are in the EngraverTextH font. H is for harp and you’ll find several useful harp symbols in there. If you download the font pack from the finale website you’ll get this.
Sorry I can’t be more specific as to exactly how to everything step by step, but it’s been a very long time since I used F2K.