Replying to Need ski advice

Hey Newschoolers I️ got a few questions, I’m a bit of a noob gear wise at skiing
1. Are boots more important than skis? And how important are bindings?
2. Are there any good skis under 350 that arnt used? I️ ride all mountain with some powder and some park, I️ want a playful ski to make the whole mountain a terrain park but still preform in powder. I️ also find no luck in buying used skis.
3. Anyone tried the 2017 Rocker2 100? Are they good?
4. I️ am 5”8 and growing, wtf size do I️ buy in saga a medium?
I️ thinks that’s it, any response helps thanks!
Btw the I️ are i”s it’s just really annoying to change them.