Be advised .......... As Dave-X10_L stated, all of this can be done with X10. Just be prepared that you might have to spend a little more to get it to work.
hawk1 is correct! Your home runs on 220 (240) volts... which is really two 110 (120) volt lines. These two lines are separate phases... and if you have two X10 devices on different phases... they may not communicate with each other. The RF (radio freq.) of X10 devices can be limited as well. There is LOTS more about these issues here at the forum.
But putting an X10 alarm, with a (couple) sirens and phone dialer in the garage
should be pretty simple. The X10 alarm is suppose to be the largest selling in America.
However... the more complex the setup... the greater the likely hood you'll have issues to deal with.
X10 isn't really a plug-N-play technology. But X10 is an old well known and easy to understand technology. I don't work for X10... and I don't profit in any way from its use. I do have a somewhat large X10 setup... and I really enjoy it (
you can check out my Site and videos at the links below) . I personally haven't had great success with the X10 cameras and software with Internet viewing... so I recommended the cheap IP cameras (
I've had luck with them).