Windows user to MacBook Pro

Helpful Information for Any Mac User by GGJstudios​

1. Activity Monitor > Network or iStat Pro widget.
2. TextEdit or Stickies or Dashboard > Stickies
3. Finder > Preferences > General > Show these items.

 

Nah, you're not coming across like an idiot.

Just Google "Dashboard widgets" and click on the Apple one. Below is a link to iStat Pro.
iStat Pro

 

http://tools.chocoflop.com/entonnoir_en.html
via "netlimiter mac alternative" as search terms.

 

Can't help you with NetMonitor I guess, I looked myself several times over the year, I only found some Terminal script.
As for viruses and malware:

There are currently no viruses for Mac OS X in public circulation, only a handful of trojans and other malware, which have to be installed manually via entering the administrator password.
The only anti-virus you need to protect your Mac is education and common sense.
Also know, that the term "virus" is often used to refer to other kinds of malware, but there are differences, which you can find out by reading the following:
Mac Virus/Malware Info by GGJstudios​

As for security settings:

Mac Security Suggestions by munkery​

 

They can, but they don't, since no Mac OS X viruses exist. You don't need any 3rd party antivirus app to keep your Mac malware-free. Macs are not immune to malware, but no true viruses exist in the wild that can run on Mac OS X, and there never have been any since it was released 10 years ago. You cannot infect your Mac simply by visiting a website, unzipping a file, opening an email attachment or joining a network. The only malware in the wild that can affect Mac OS X is a handful of trojans, which cannot infect your Mac unless you actively install them, and they can be easily avoided with some basic education, common sense and care in what software you install. Also, Mac OS X Snow Leopard and Lion have anti-malware protection built in, further reducing the need for 3rd party antivirus apps.

Mac Virus/Malware FAQ​

Go to System Preferences > Security > Firewall and make sure it's enabled.
Go to Safari > Preferences > Security > Enable Java (uncheck this. Enable JavaScript is ok to leave checked)
Go to Safari > Preferences > General > Open "safe" files after downloading (uncheck this)

 

http://guides.macrumors.com/Force-quitting_applications

Cmd+Option+Esc should do in most cases

I'm not sure what to do if you have an application that overrides most keys. Anyone?

 

There are a few ways to do this in Mac OS X.

As thundersteele said, Command-Option-Esc will bring up the Force Quit Applications menu

You can also hold the Option key while right-clicking the app's Dock icon, then select "Force Quit"

You can also launch Activity Monitor, select the process, then press the Quit button.

 

CMD+OPT+ESC is the easiest method for me