Cycling Questions (ride, speed)

[PurpleLove08]

I really want to get serious about biking to school and possibly combining biking with public transportation for my commute to work. The bus stops running around 7 or so and I get off work at 9. I'd have to bike my way back home, which I don't think will be so bad. I have a pretty nice downhill ride for part of it.

I live about 7 miles from work and 4 miles from school. My only concern is just the speed of the cars and whether or not they will see me. The speed limit to my school is about 35-40 and it's somewhat hilly.

I am also really nervous about my bike being stolen.

Does anyone know of any insurance companies that will cover my bike if it's stolen? I have a pretty cheap model right now but I plan on saving for a bike. I'm on the fence about if I want an electric bike or not. Any tips or experiences are welcome. =]

Can anyone recommend:
a) a good bike chain or two to prevent theft
b) A good light for my bike. I'd prefer one that is powered by pedeal power rather than one I have to buy batteries for.

I'm pretty worried about the sweat factor since I'm a heavy sweater. Anyone have some unique or odd ways of dealing with sweat? I've found some tips online and I'm always open to more.

I really appreciate you taking the time to look at this. =]

[brently54]

For locks, check out Kryptonite. It will show you which locks are good depending on the amount of crime in your area.
Kryptonite Locks - Products - Bicycle Products

I have a regular small battery bike light. I don't know much about pedal powered lights because the batteries last so long on the light I have. You can also get rechargeable lights.

What kind of bike do you want? Road? Communter? Mountain? Single speed? I know what you plan on doing with it, but it doesn't answer my question!