No. You will always need the password to install applications. You can
auto start without password but I won't install a system that way. You
can change the password if you search but having to use the password
every startup insures you remember it for installing programs.

Turn off the screen saver and in power management don't let the computer
log you out unless you tell it to and that will leave signing in to the
computer startup.

The password is the only thing between your authorizing others to use
your machine as they like, or not. If security is a non-issue for you,
you may consider just sticking with Windows and your wish is what they
do best. On the other hand, I believe you came to Linux to kiss bad
practices goodbye, so let the request for a password be your reassurance
that Linux is doing whatever it can, to make your security top priority.