To my knowledge, yes.
No, it's not possible for just him to as the two toads can't sit on his shoulders and be still for him as the Kyuubi (Kurama) rejects them. He can however, make Kage Bunshin (Shadow Clones) and they can sit still for him and then he just summons them back.
yes just gather natural energy in your hand
Naruto Episode 197: Crisis: The Hidden Leaf 11 Gather!
Shippuden episode 194
photosynthesise. they gather chemical energy from the heat energy produced by the sun
No. One of Akatsuki's goal was to gather and extract all the nine tailed beasts, which would have resulted in Naruto's death.
From nutrience
solar energy
Photosynthesis
Chaka is not something you can really see, but it is an energy. You can tap into it and you can change it, but not "gather it."
leaves/ leaf
To gather passwords from machines running Windows.