-Carrying capacity - 1 tonne (actually, a bit bigger, but a tonne is normal, nor peak value)

Sounds like Supernatural Strength.

-Weapon rating 6 (for CoD terms, it means... idk, actually, because the limit is 5 - for chainsaw. So, may be a big chainsaw)

If I recall correctly, they are almost identical mechanical concepts. If you manage to hit with your weapon, you apply the weapons rating as levels of damage appropriate for the weapon. So just throw Claws on top of your Strength and you get incredibly deadly strikes.

-Speed around 48 mph

Supernatural Speed is described as enough to 'keep up with a car' so that seems about right.

-Depending on form, which he had before fight starts, he can compel enemies Initiative (like he'd have Supernatural speed).

Well, you're doing my work for me at this point.  Yes, if you want this concept to effectively always react first, Supernatural Speed is your way to go.

Considering dice probability, he can kill average-but-tough person (Health 8, Defense 6 in terms of Chronicles) by first hit with chance around 85,06%.

This last little part doesn't translate well to FATE. I'm just parroting what has already been said, so I won't comment on that aspect. I will add, however, that the 'average' person will be taken down by this build. An unimportant bystander NPC will likely only have 4 stress boxes, which you can easily overcome with one swipe.

I'm not sure if you have the Paranet Papers, but the Spellcasting Addendum there actually explicitly outlines how to bestow powers on others through thaumaturgy. Its quite elaborate and costly though.

1. This is a very tricky one to do, because FATE is more about you get what you pay for. So if you want to play a bird, that's awesome but without paying refresh for Wings then you can't fly. So, the mechanics of the system don't really afford for the ability to bestow power on other people. However, there are a few ways to try it. Simplest is just aspects. Give the character Thaumaturgy and then only the ability to use it one other people. Then the characters use aspects to simulate power bestowal. A more complicated way is to use the Temporary Powers rules, make a -1 or -2 refresh power that justifies your character giving powers to people and then have him spend fate points for those temporary powers.

2. Voodoo is pretty easy to simulate, its a just a combination of True Faith and Thaumaturgy. The Thaumaturgy would have a focus on Entropomancy and Enchanted Items and the True Faith powers would probably include Righteousness and maybe Guide My Hand.