Fog lights, I suppose there's no reason why you shouldn't. It might be quite expensive though, you will need a new bumper, spraying the bumper, lamp holders, switch unit. You will probably have to run a separate feed from the battery to the switch, then from there a feed to a relay for the lamps. so yes I suppose it could be possible, but it going to be a lot of messing about. just depends how much you want fogs.
Cruise control, I have no idea if its even possible. it will require indicator stalks if it is, but as I say I really don't know if its possible, or how easy it would be to enable.
You have to ask yourself, is it worth it? I know its not always what you want to hear, but maybe think about swapping the car for one with those things. It might even work out cheaper.