If you're going to start with extracts or mini-mash brews, then possibly move on to all grain, get an 8-10 gallon pot now. This will allow you to do full boils for extract, and be easily repurposed for all grain later down the road. A thermometer for monitoring your steeping and boils temps, one that clips to the side of the pot makes it easy to see at all times.
Boiling 3 - 6 gallons of water on any stove is a chore and takes a lot longer than a propane cooker. Brinkmann makes one with 120K BTUs that's about $50, and then a propane tank to go with it.
An immersion chiller will definitely make your life easier, a 50' stainless steel one will last you forever and is easier to keep clean. Maybe a few 6.5 gallon fermentation buckets, easier to clean than carboys and beer makes a bigger fermentation mess than wine. A bottle capper, unless your wine capper is dual purpose.
That should still leave a little money to pick up or put together a few kits to brew, along with the other odds n' ends we're currently overlooking.
Welcome to your new obsession....