well first things first, the inner rack joint is not a failure, advise only.
only way it can fail on it is if the steering wheel moves a certain distance and the wheels dont.
the floor pan, it will just need undersealing if its passed, get it on a ramp, wire brush any loose old underseal/rust off, and cover the whole lot in underseal, will cost about a tenner, get it done now though, any longer and it may need welding.