These are difficult ones. Your horse and apple are Murano style pieces, but it is difficult to say for sure without seeing the same pieces that are attributed. Horses are made in almost every glass-making country. They are popular knick-knacks that take less than 5 minutes to make, so are turned out in fairly large numbers. There are several videos on You-Tube of people making horses if you are interested in watching them.
The apple leaf looks very Murano to me, but I do not know who might have made it. The iridescent finish is particularly nice. This type of iridescence is not common in Murano, but has been done. Several other countries have glass with gold and aventurine, though, so it is risky to say it is definitely Murano without finding one like it that has a good attribution.
I don't have any ideas for your vase. I have the feeling it is not Murano, but cannot say for sure.
Wish I could help more,