Hi @Naxas,
Strength attribute will increase the damage of the physical hits, while Magic will increase the damage of the spells. If you hover over the attributes on the team screen, you can see a description for each statistic.
I hope that helps!

so, my summoned skelletons will need (my) strength to hit harder?
or are they compleetly unaffected by my own Attributes?

The skeleton's stats are affected only by your intelligence. So more intelligence means your skeletons will be higher level.

help please i only see magic and willpower that may afflict temp Minions
and can you reset Attribute points
thank you for reading this

I don't get the first part of the question, could you elaborate a bit?
For the second question, yes, you can indeed reset all your skill points on the bottom right part of the skill tree screen.
Have fun!