Does this ladder come with mounting hardware?

The ladder assembly is confirmed — mounting hardware specs are not detailed. Test-fit to your tailgate first and verify what fasteners or brackets you'll need before installation.

Will this fit my truck's tailgate?

This is a universal design meant for standard pickup tailgates. Measure your tailgate width and step geometry against the ladder dimensions to confirm compatibility before ordering.

Does the steel need to be painted or sealed after install?

Prep and finish details aren't specified. If exposed steel is a concern, apply a rust-preventive coating after mounting — standard automotive primer and paint or clear sealant both work.