I simply could not resist using that kit. Period. Once you get over the film loading hurdle (its not hard at all after a little practice. Seriously) you will probably enjoy the film experience. Its best with a beautiful old rangefinder with nice lenses attached. I'd also take the advice regarding storage in leather. If nothing else, leave the case open and keep the dry fresh air available. Stick some silica gel packs in among the items as well. Of all the things that can destroy the "value" of that set, fungus is near the top of the list.
Often, an assembled kit like this tends to have less selling value than separate items. It might seem unintuitive, but that's the trend. I really couldn't say what the "value" of the kit would be, but I'm sure $1000 or possibly more. Depends on the reason for valuation. If my insurance company wants to settle a claim for theft or fire (loss of the kit), I'd certainly up the "value" to something that would reflect individual purchase of all the items separately. We know the body alone, if in good condition, can bring over $300, the Summaron can also bring over $300, again if in good condition (no fungus!), the 90 and 135 lenses not so much, perhaps $100. The VIOOH is not terribly desirable and so less than $100. Are you getting a better sense? Filters, adapters, accessories, and hoods are extremely variable in selling prices, you will have to research those if you're interested.
There are other folks on RFF who have much better knowledge about Leica stuff. I'm pretty sure they would need to know more specifics about items to really pin down value. But since you're just looking for general "insurance" level value, I think the above works.
Now, I'd put aside worries about value and load the camera with some film. I really think you'd enjoy using it. Film will make you slow down and enjoy holding that lovely camera, framing and envisioning your shot with a very nice quality lens. When the roll is done, its delayed gratification while you either get the film developed or even develop it yourself. The results come with more effort and delay than digital, but the satisfaction and overall experience seems more pleasant. I hope I've convinced you.
