[ILUG] i'm facing some problems with linux please help me (reply as soon as possible)

[Mona Hammoud]

okay so here are some problems:

problem 1:
 i have 2 operating systems on my computer : Windows
Me and Red Hat Linux.
I faced some problems with Windows so i deleted all
the partitions on my computer to reinstall both
operating systems again. I deleted the Linumx and the
Windows partitions.
The problem is: When I boot the computer LILO is still
there but can't load Linumx or Windows. 
When I boot the computer with a startupl disk and
after creating a primary partition FAT 32 to install
windows, I run setup from the windows cd rom when it
tests the system for setup (100%) it reaches 100% and
then freezes. so i have to reboot (I can't install
windows because everytime i run setup it freezes)


problem 2:
 when i use the command gcc to compile a c program the
following message appears:
bash: gcc command not found 
why?????????/


problem 3: (same user switch between terminals) 
i'm a beginner for linux os. i know that we have
something called tty1, tty2, tty3, tty4 can i know
what are these? and how to switch between them?

problem 4:
how to run a C program after compiling it?


please reply as fast as possible because i really need
these information.
i have been reading for 2 days and i really have to
know the solution for these problems
thanks 
sincerely, Mona.

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