A smashed one!
the spider is the crab spider
A black widow. This spider is only a black widow if the entire spider is black, with a round-ball looking back-body, female variety if there is a red hourglass shape marking on the underside of the spider. From the top black widows are completely black.
The black hairy jumping spider has a black dot on it's head, and large green fangs. This spider is a beneficial spider, that keeps other insects at bay.
It can be hard to tell what kind of a spider you are looking at that has a red head and back and black and white striped legs, since the body type is also an important factor. Chances are that it is a red-headed jumping spider, which can cause a somewhat painful bite but is not otherwise dangerous to humans.
A ladybird spider is a spider whose red body has four black dots.Specifically, the spider in question can be found natively in Greece. It carries the scientific names Eresus cinnaberinus and E. sandaliatus. It has white-striped black legs. Its fused head and thorax (prosoma) is black. Its abdomen-like rear (opisthosoma) is red, with 4 black dots.
The male green jumping spider has a dark red head and a bright green body. The scientific name for this spider is Mopsus Mormon.
A Woodlouse Spider!
It could be a wolf spider which has bites are are painful but not poisonous. There are many common house spiders that have these markings.
head legs eyes
tarantula
that sounds very possibly like a mouse spider
I think that it might be a garden orb weaver, which is not dangerous, or a marbled orb weaver (which is in the same family). But, most of the pictures of this spider do no show it to be bright red....?