what are reduction oxidation reactions?
Your questions involve a lot of chemical concepts.

An oxydo-reduction is reaction where electrons are exchanged between species including or not molecular rearrangement.

You totally can write down any salt in the following way, emphasizing ion charges:

$\mathrm{NaCl}_{(s)} \equiv \mathrm{Na^+Cl^-}_{(s)}$

As long as you specify the phase, because when writing down an ionic form the chemist might assume that it is solvated into water. To underline it you may write the following:

$\mathrm{Na^+Cl^-}_{(aq)}$

Further more solid generally have numerous possible distinct phases, therefore you may need to specify which crystalline structure the salt have.

The following equation is explicit:

$2\mathrm{Na}^{(0)}_{(s)} + \mathrm{Cl_{2(g)}} = 2\mathrm{Na^+Cl^-}_{(s)}$

And underlines that an electron is withdrawn from metallic sodium in order to produce chlorine. Anyway, this equation is global balance this it hides many details of the complete and complex chemical process, especially the formation of the crystalline structure. And it does not provide any information on conditions of reaction.