The pattern includes: detailed descriptiona and step by step pictures

You may use any yarn you like and the hook for it.
The size of the toy depends on you yarn.

I used the next materials:
Materials:

Yarn: Alize Cotton baby soft (50%cotton, 50% acrylic; 270m/100g)
orange/yellow - for the body and legs (37/113)
brown - for legs and hat (240)
green - for hair (255)
2) hook: 1.75 mm
3) stuffing material
4) yarn needle - for sewing parts
5) pins
6) marker
7) scissors

The size of easy toys (without a hat):
(I crochet the orange pumpkin loosely, yellow one - tightly. So you may see the differents)
I recommend crocheting tightly.
orange pumpkin - 14cm (diameter - 37cm)
yellow pumpkin - 17cm (diameter - 41cm)

You should have basic crochet lessons. I use US terms.
abbreviations:
MR - magic ring
ch - chain stitch
sl st - slip stitch
sc - single crochet
hdc - half double crochet
dc - double crochet
inc - increase (2 sc in 1 stitch)
dec - decrease (2sc together)
BLO - back loops only
FLO - front loops only