Whether you are new to hiking or just want a brief hiking equipment checklist to refer to, the following should be stongly considered as your minimum equipment requirements:
Hiking boots that you have "broken in".
Trekking socks and depending on your own preference, thin liner socks.
A fully waterproof jacket that has a hood with a stiff peak.
Waterproof over trousers and gaitors.
A windbloc fleece and/or a light "shell".
Rucksack.
Sandwiches and energy food plus at least a litre of water.
Torch.
Map and compass.
Small first aid kit including plasters/blister pack.
A loud whistle.
Warm trousers in winter (Jeans are not advised).
A spare top/baselayer in winter.
In hot weather carry more water and/or be prepared to boil/treat stream water.
Emergency survival bag.
Warm hat, gloves and waterproof gloves.
Baseball type hat etc for sun shade.