ok here we go ill try my best
1. gasket: no oil drain
remove two bolts holding cover down, remove cover. clean cover. remove gasket, clean all little pieces away. clean up little bits if some fall among the rockers.
apply "gasket cement".
im not sure if its absolutely needed for the cork gaskets since they can compact down. better be sure and apply some. mine's a little white bottle (20mL) with a pink lid and applier and is dark brown and thick but runny
2. chrome is whiter and smooooother, and expensive as a metal, plated onto other metal or plastic.
stainless steel is an alloy, made of cheap iron, carbon and a small amount of chromium. its more grey than pure chrome and people can tell the difference. i dont give a hoot's arse.
3. a sump is a resevoir of something. a sump guard is a plate of metal you attach to the subframe (?) that guards the sump (your gearbox area).
http://www.angelfire.com/mech/ducho/sumpguard.JPG (cut n paste)
the triangular thick castiron-like silver painted thing in the front
ill tell you its pretty good. ive scraped it a couple of times on driveways, speed bumps, rocks. glad it wasnt my sump getting hammered
4. hi-lo's are things that allow you to adjust the height of the car by turning nuts on the hi-lo's. im not sure what they are classified as: suspension or shock absorbers? i think cut your springs to make it higher in the front (or is it to make it stiffer?) (dont think you can do it yourself), and add a sumpguard.
my car is about 8-9cm off the ground... pretty much no trouble