On question 1, to expand on what @BK said: If you have a symplectic structure $\omega$ on a manifold $M$, you get a natural Lie bracket on $\Omega^1(M)$ by the following rule:
$$ [\alpha, \beta ] = \omega^\flat([\omega^\sharp (\alpha), \omega^\sharp(\beta)]) $$
Where:
$$ \omega^\sharp \colon \Omega^1(M) \to \mathfrak{X}(M) \quad \omega^\sharp(\alpha) = X \ \Leftrightarrow \iota_X \omega = \alpha $$
$$ \omega^\flat \colon \mathfrak{X}(M) \to \Omega^1(M) \quad \omega^\flat(X) = \alpha \ \Leftrightarrow \iota_X \omega = \alpha $$
If you have a metric $ g $ on $M$ then you can define similar sharp and flat maps by pairing with the metric tensor instead. The problem is that the sharp and flat maps completely characterize the tensor. Therefore if $g$ induces the same isomorphism between $\Omega^1(M)$ and $\mathfrak{X}(M)$ as $\omega$ it follows that they are equal. The problem with this is that a metric cannot ever be equal to $\omega$.

In fact, symplectic structures are much more closely related to Lie algebra structures than metrics. So I think if you're trying to construct some Lie theoretic object, my recommendation is that you look more into the symplectic universe.

That said, regarding Question 2: There is no canonical way to make the $\Omega^i(M)$ into Lie algebras by using a symplectic structure. Is it *possible*? Sure, why not? By picking a basis for each vector space and splitting them along the images, kernels and cokernels of the differentials you can construct a variety of split Lie algebra structures on the resulting infinite dimensional vector spaces. But there is nothing geometrically interesting about this.

If you want a more natural Lie-theoretic structure that has some real geometric meaning, you can continue the suggestion of @PaulReynolds to look at graded brackets. I'll refer you to wikipedia for the definition of the Schouten-Nijenhuis bracket:

https://en.wikipedia.org/wiki/Schouten%E2%80%93Nijenhuis_bracket

Since the symplectic structure on $M $ produces a bunch of isomorphisms $ \omega^\flat \colon \Omega^i(M) \to \wedge^i \mathfrak{X}(M) $, you can transport the Schouten-Nijenhuis bracket to the complex of differential forms.

A closely related, but different option is to weaken the symplectic structure to a Poisson structure. Basically, this is just a Lie bracket:
$$ \{ \cdot , \cdot \} \colon C^\infty(M) \times C^\infty(M) \to C^\infty(M) $$
which satisfies:
$$ \{ f, gh \} = g \{ f, h \} + h \{ f, g \} $$

By using this bracket, you can actually construct a Lie bracket on $\Omega^1(M)$. By using the exact same formulas for the Schouten-Nijehuis bracket, except using 1-forms instead, you can get a graded bracket on the whole complex of forms. Depending on the Poisson bracket you started with, these carry a lot of geometric meaning regarding symplectic foliations and other cool stuff.

To be clear, these structures I just described do not make the differential into a Lie algebra homomorphism. Rather, I believe you get that the differential is a derivation of the graded bracket. That is:
$$ \forall \alpha \in \Omega^i(M) , \ \beta \in \Omega^j(M) \quad d[\alpha,\beta] = [d \alpha , \beta] + (-1)^{i}[\alpha , d \beta] $$

Maybe try looking at *Gerstenhaber algebras and BV-algebras in Poisson
geometry* by Ping Xu for some more advanced reading on the topic.