Here are a few things to go by:
To tint your glass use the fog multiplier. Go to
http://www.spot3d.com/vray/help/150S....htm#fog_color for more info on settings.
You have two easy options for reflections. Keep adjusting the reflection from mid grey to white to get stronger reflections or put it to 255 (white) and tick the fresnel reflections box next to the color swatch.
The glass has to reflect something in order to get a nice reflection effect. If you only have a sky then thats is all you will see in the reflection. It will look like blue glass.
You may want to try using a HDRI in your environment. This way you will get clouds and possibly a sun reflecting on your glass.
Keep asking and hopefully we all can help you out.