naive query about scsh

to  scsch adepts:

1. With little knowledge of unix etc, I managed to get scsh running under
    Terminal (tcsh; Mac OS X (version 10.2.8); November 2001 ibook).
    I didn't understand why (car '(a b c)) returned 'a. See below. Is it
    because Scheme 48 is different from other Schemes? Or perhaps
    because I did not put "(car '(a b c))" in a shell script?

2. This is the second Scheme I have tried to get working under Terminal.
    In each case, using the "delete' key to backspace and delete has
    failed to work under the Scheme prompt. (But it does work when
    typing in straight unix commands). Is there something wrong
    with Terminal?

Any guidance appreciated.

Roger Purves