The Skate skis are already prepared. So no need for preparing the Skis, you can just put them on.
Skate poles = 0.9 x Your length
Ski boots: Take a size larger than normal when booking a ski boot, as they are small in size.
Ski length: Choose a pair according to your weight. Suitable weight intervals are written on the skis.
If you are renting skis to join Thursday practices with StiL Längdskidor, the rent is 50 SEK/pair.