garage/keyless remote

I lost one of my remotes for the garage door opener. Was wondering if anyone has experience with keychain universal remotes for the garage door opener. Ultimately I’d like to have one remote for both the car and the garage opener. I have three cars 96 Volvo 850 – factory remote, 95 Toyota Camry – Pursuit security remote, 05 Camry – factory remote (not a security system)
Would appreciate any ideas you can give me!

I doubt it unless you are a master programmer. They operate on vastly different frequencies. You could construct a transmitter that emits both frequencies, but it would require some pretty advanced electronics engineering. I'm not the guy for that kind of info, but maybe someone else here is :)