apparently you have your repository URLs not configured correctly. they should point to your linux distro's official package repository. if you don't fix this, you won't be able to install any packages. I suggest you find out your linux distro repository URLs and enter them in your apt config files. Also check that you have Internet access. ping google.com for example
after you fix this, install listed packages, then run fpcup, it installs lazarus to /home/you/development/lazarus