Few Questions about my car

I recently bought an 89 Cadillac Fleetwood Brougham D’Elegance and I just have some questions about it. First off, what the heck are sequential lights(it’s a turn dial on the regular light switch that you pull). What side lights on the front do what, I’m not sure what light is out on the front. My blower is stuck on low, which is the restator I believe? Left side blinker marker doesn’t work, can I fix that? When I turn the key to start the car it gets kinda jammed there and “over revs” the starter. Would Wd-40 work for that? Both of my opera lights don’t work either, is that hard to replace? Thanks in advance for the answers, like I said I’m new to the caddy world but I’ve always loved them, bought the car for cheap and would love to restore it to its beauty.