How a carlarm is installed

Yesterday I went, for the Electronica store and I saw several beautiful alarm models, and days before my car did not sign because the battery disconnected for a long time, 1 hour .. And without knowing my car that I bought it for use I had an alarm, which was active, and did not allow my car tube to take it to remove it to be able Question is that I would like to put the doors, with the remote control, if anyone knows where I can find a manual I will appreciate it, or that guides me how to do it.