None unless you want them to look as spectacular as Sethl's. They're generally molded in the appropriate colors, with some paint for details like faces, and stickers for other, usually-flat details. I've never felt the Super Minipla Daizyujin needed any additional paint.

None really, like Tokumonkey said. The stickers are pretty comprehensive, I just like painting.

The super minipla, I think, are even pre-painted in spots.

Bandai staff blog has been updated.
New pictures for liverobo and liveboxer.
There is also a teaser for what should the next sentai robot in the super minipla series. It should be turboranger (the sentai that followed liveman).
No date has been given...

Neoxul

Preorder are open on amiami for minipla vs vehicule 1 and 2 (respective release in march and april).
Good thing, they keep the complete set (5 box here) and the usual box (12 boxes).
Link for vs vehicule 1
Link for vs vehicule 2

No real information about the content. As a complete set is 5 box. There should be one box for each vs vehicule and 2 boxes for goodstriker. (and goodstriker will be available in each set as shishivoyager this year)

Neoxul

It looks like the candy toy figures will be YU-DO. AmiAmi is selling boxes, but not sets. Boo.

I'm tempted to pre-order the 5 box sets because they are probably the mechas but without confirmation I'm hesitant to pull the trigger. Hopefully we see official pictures soon.

Unlikely. My experience so far has been that if I wait long enough to see pictures - or even get an accurate description of the contents - pre-orders will have long ago sold out. I've missed out on several waves of candy toys that way. Oddly, though, Bandai's blog at least showed off the YU-DO, but there were zero minipla pictures in that article.

Minipla preorders always reopen on release though, sometimes before then. It's not like DX toys where if you miss them getting listed that's it.

I thought the same thing when I saw the preorder as there is usually "gattai serie" in the name. But if you look in the past and on the minipla, it is always the robot that are on sale (the mini kyutama last year is a first for me, and it was release on the last serie !)
So I did preorder, there is no chance that it is not the robot.

Neoxul

In the end I received 3 kojishi voyager, 2 moraimars and 1 kill kyutama...