Greetings guys and gals,
I'm totally new to kali and in need to learn as much as possible for I will be stuck with this OS for the next couple years. I have already done some research on Google and watch videos on youtube but unfortunately, none answered my questions.

1st question: As a standard user, will I be able to use the program(s) that I have downloaded from root account? Ex. Tor. Do I have to download these programs again on all users? :/
2nd question: Whenever I download a program via terminal, it doesn't add on my desktop. I couldn't find it anywhere and it doesn't appear anywhere on the application section except the synaptic program.
What must I do? Any help and advice is much appreciated.

Ps. Bear with my grammar : ]