Is it possible to capture a button press from the universal garage remote that is built into my car? id like to use this in my project to turn on porch light and unlock the door. do I need some kind of RF sensor or am i just dreaming
No, you are not dreaming. You can use Rpi/RpiZW/ESP8266 for WiFi control. You can use your smart phone to "press" a button.
You can DIY the following open garage project.
The above answer is too brief. I should have suggested that more relays can be added to control porch light and solenoid door lock.