How many trims are there for the 4th. gen hatch? What are they? SI, DX, etc...

Which ones have multi-point fuel injection?

Are there SI's without a sunroof?

Should I get this car? '91 Honda Civic It'll most likely go for less than $1000. (I'm 90% sure).

What should I keep an eye out for since it is an auction car?

Thanks for your time. Please help me out.