Roughly $3000... actual will depend on sales, and how much work you do yourself...
Towbar/Baseplate: Most popular seem to be Roadmaster and Blue Ox. I use the Roadmaster Falcon All Terrain - allows for connect/disconnect with vehicles uneven/unaligned.
Brakes: Choice between portable and permanent install. I chose permanent and went with Roadmaster Invisibrake - which uses the vehicles power brakes (supplies its own vacuum) and charges the toad battery while towing. All systems include a form of breakaway protection. Many have a 'monitor' in the cab of RV.
Lights: Some form of lighting for rear of the toad - ranges from magnetic add ons, to additional bulbs added to fixtures, to additional wiring with protection diodes to existing lights or an OEM offering...
I used the OEM Mopar harness for the Wrangler - plugs in under dash - and uses the normal Jeep wiring to taillights.
Safety chains, locks, other miscellaneous stuff.
Shop brands - choose your options - include any installation in your numbers - and see what you can get the best deal on.
Don't think you can go wrong with any Roadmaster or Blue Ox setup.
Not yet retired...
Florida (Michigan transplant)
2014 Hurricane 32A
2000 Infinity (previous)