Welcome to The Herd, Sir. We're all friendly fire here so you'll be among R65 friends.
regarding your questions:
1. Yep, the red tank and tail piece may be faded enough that you would be hard pressed to match the paint with OEM color. Check with a local auto body supply store and start looking thru automotive colors, especial Japanese autos. You may find a very close match. Some shops can even provide these paint colors in rattle cans. In the mean time, black is always appropriate with Airheads.
2. Push rod seals can be classified in three levels: Weepy, Seepy and Leaky. Replacement requires yanking the cylinders, new gaskets and o-rings, plus holding your tongue just right. Not difficult, really. Just some busy work. You'll have to decide what' best for your scooter.
3. Magura OEM-style grips are available. They have a sort of square cross section. I run them on my R100S but have dense foam grips aftermarket grips on both R65s. Found 'em at a Cycle Gear store. They are quite comfy.