Sweet Crown my friend. Would love to see some more pics of it too. From back and especially interior. It looks sensational though.
As for brakes, it really depends what you plan to do with the car. Given the condition of that car I am hoping she's just going to be a Saturday night and Sunday arvo cruiser in nice weather and displayed at some car shows. I expect that it will not be involved in any drags from the lights either, so in all honesty there ios no need to go through the hassle and expense of upgrading to discs. Just service your master cylinder and wheel cylinders, have a look at the shoes to make sure they are not worn, clean out the dust from inside the drums (don't get any grease or oil or indeed anything else on your pads or the inside of your hubs of course) and you should be stopping just fine. Also just check that your lines are all okay and not cracked or leaking.
If however, you are going to create a super Crown street sleeper....... then upgrade your brakes.
Also, I suggest and I assume you already plan to do this, but if that Crown hasn't been rego'd since '94, then go through and replace all your fluids, check your radiator, thermostat etc. Also I would replace plugs, leads, contacts, rotor button and cap. Cheque dizzy for free-play in the shaft as well. While at it, I'd drain the tank, pull it out, give it a thorough clean and check the fuel line. Replace the fuel and oil filters too.
Hehe..... well I guess all that stuff just makes common sense really when a car hasn't been used for 13 years, but I'm bored at work.
Oh, also......... make sure you wash it and vacuum it. Hehe..... and photo's.... don't forget more photo's.
Btw... what state are you in? Looks like an NSW plate in the background of photo?

I think that Crown needs a white venetian blind in the back window if it doesn't already have one.