  We present first results on the Dirichlet-to-Neumann operator associated with
the $1$-Laplace operator in $L^1$. In particular, we show that this operator
can be realized as a sub-differential operator in $L^1\times L^{\infty}$ of a
homogeneous convex, continuous functional with effective domain $L^1$. Even
though the Dirichlet problem associated with the $1$-Laplace operator loses the
property that weak solutions for boundary data in $L^1$ are unique, we prove a
type of stability/compactness result with respect to the boundary data in $L^1$
of this problem. We apply our results for the stationary Dirichlet problem to
evolution problems governed by the Dirichlet-to-Neumann operator, which can
equivalently be formulated as singular coupled elliptic-parabolic initial
boundary-value problems. For initial data in $L^q$, $1\le q\le \infty$, we
obtain well-posedness, that every mild solution is, indeed, a strong solution,
and establish long-time stability of the semigroup generated by the negative
Dirichlet-to-Neumann operator associated with the $1$-Laplace operator.
