Yr chiller needs upgrading.
Ehiem return pump can be reused depending on the flow rate. If is 1260 to 1264, still possible, other than that might may not be ideal and used for other purpose like fluildiser, etc. however, it will also depend on yr tank design with single or dual return.
Light needs add on.
Media will depend on yr preference and design.
NSW has delivery and price ranges from 50 to 120
Return flow rates will depend on wat u keep but in general 3000 l and above with little head loss. 6000 and above might be too strong.
Wave maker, 5,500 to 12,000 and depends on yr placement, quantity and tank return pipe design.