I listened to a few of the songs. Before I criticize, let me say it's obviously better than anything I could do musically -- I only play piano. This definitely is pretty good for an amateur with no fancy studio equipment. But this is also not my style of music, so I couldn't really "enjoy" it.
You remind me a bit of my cousin's band. For the most part, they played slow songs. They had some talent, but the music wasn't right to fit any genre of today. They played in coffee houses and at a few public events, but the only people who liked it were family members, grandmas, and a few groupies.
With that said, the first thing I would do is modernize your music IF your plan on trying to sell it. If you are just doing this for creative/entertainment purposes, then by all means... carry on.
Second, I have to agree that the vocals are too breathy. You said you only have two octaves. If you want to get really serious, you may want to take some voice lessons to try to improve on that.
Lastly, while it's great you can play all those instruments -- it lends itself to the phrase "jack of all trades, master of none". So you may want to take time to really master one of them (probably the guitar). That way, even if your music doesn't work out you could try to join an existing band (or form one yourself) where you would be the lead-guitarist.
To summarize, the music is pretty good -- however, if your intent is to make this a serious endeavor then 1. modernize the music, 2. take voice lessons, and 3. master the guitar. You'll see a dramatic improvement in the results.