Does Chill Touch prevent a slain Troll from returning to life?

If wielding a sword in each hand can you decide what to main action attack…

Can a caster cast a spell like Shield or Counterspell, if there is no attack made against them?

Telekinesis vs. a PC with freedom of movement. What is the outcome?

Does magic armor resizes from pixie to giant?

If I understand it correctly, there are weapon attacks and there are spell attacks…