I echo the lists above you can never have enough sharp knives, scalpels are the best with a fairly short broard handle with plenty; I'll repeat that; plenty of blades No's 11 and 10 seem to cover most uses. Try a medical supplier or chemist if your model shop doesn't carry them, just remember they are very very sharp and you can easily cut yourself without knowing it, and suddenly your model is covered in red paint, whoops blood. It's also good to have a heavy duty knife something like the Ex-Acto type or copy of, the type with a collet that clamps the blade as scalpel blades can easily break if used with force. Model and bead shops usually carry some good tweezers, get a small selection both open and closed ones.
Sanding sticks are also very useful far better than loose bits of emery paper. Try the multi-coloured ones with several grades on them, If in the chemists look at the nail care section for polishing and emery sticks, might be cheaper than the model shop. If you nearest town has an electicians supply of engineering suppliers try them for fine side cutters, they must be flat on one side and finely pointed. If you get a pair or two DO NOT use them on metal no matter how tempting it may be, keep them for plastic and they should last for-ever. Also while there see if they have very fine drills 0.3 to 1 mm depending on you requirements. Most of the drill sets sold on-line are actually used ones from circit board manufactures, and can be a bit dull, the ones from an engereering supply store will be sharp and for plastic very sharp, just never never use them in a power drill. Remember the very fine ones 0.3 to 0.5 mm are expensive and fragile.
If you can find a jewllery supply and or bead shop you could get a bead reamer set. This is not essential but oh-so handy in enlarging small holes when you haven't the right size drill. You might even get a small diamiter pin vice, (Ideal for drilling rigging holes in WW 1 aircraft and ships, also aerial wires on WW 2 aircraft.) most ones sold in model shops are a bit chunky.
Try an artist supply shop for a range of brushes both nylon and sable, (Expensive but the best, a few fine ones should do 0 to 000. Nylon is OK for the larger sizes, add a few broard flat ones 4 to 8 depending on your usage.
Finally if you have any money left, more blades, you WILL need them especially seeing you live soooo far out of town. Good luck and hope you have fun with your shoping and modelling and looking forward to seeing the results.
Remember we do this for fun & Merry Christmas. John the Pom