my point is, going into detail on those points, is basically describing half of what modding is about.
I'll do a very brief explanation, but you'll have to just read the tutorials again.
How do I fix the grab? when you usually grab, it makes your hand VERY SMALL. I want the grab to have a little smaller than the normal hand size.
There's a setting called alt_size or something, I think in modmaker it's at the bottom of the Body II tab (select the hand first, need to set both hands individually).
How do I make the tori bounce? (going up)
Either use thrust on body parts (works the same as with objects, read documentation)
Or put a bouncy object as the ground (again, read documentation)
How do I make the tori's have less points?
Look for the body score and joint score tabs and change the scoring multipliers for body parts to something lower.
How do i make a moving car/train?
Use thrust, read documentation.