The first one is Brave Transformers J-Decker, main robot from J-Decker. That J-Decker is in Korean box. Fetches pretty decent in price.
The second one is still unknown to be,but it is Korean box as well. I can do some research for you later.
Third one is Granbird from Brave Transfomers Fighbird. He combines with Figbird to form Gran Fighbird. He is in original Japanese packaging. Takara boxed Brave toys fetch higher amounts.
Don't know the fourth one...again Korean box I need to look into that.
Last one is GaoKing from Super Sentai GaoRanger aka Power Rangers Wild Force in the US. The toy is made by Bandai. I used to own these toys, and they are rare for Super Sentai stuff. The US versions used metal parts more than plastic. They are smaller than most PR toys and are highly sought after by collectors because of the metal and detail. They have weight similar to the old Godaikin toys.
Now the Japanese version has even more metal, and any of the GaoRanger toys go for big money. He can make a few bucks off of this one.
I have lots of knowledge about Brave Transformers and Super Sentai/Power ranger toys so feel free to ask me anything.