The average usual strong young man would be pretty well served with the following equipment.
I tried here below to save money where it's easily possible but spend a bit more where it's sensible.
Most people have already some equipment of course, like a rainsuit for example. One should of course take what's already in wardrobe case, attic and shed. It's also sensible to ask around if family members and friends have such stuff and would gift it to you. Nearly every old military equipment might be usefull. And a lot of old civil hiking, hunting and camping equipment too of course.
Packing list for beginners, low budget.
Rucksack Dutch army Sting, used
or Karrimor SF Sabre 45, new
The pots below fit into the side pouches of these rucksacks, what's outstanding practical.
Garbage bag as waterproof rucksack liner
Under the flap of the rucksack
Insulation mat, British army, used
Can be secured on the flap with
2 British army utility straps, used
Stuffed to the bottom of the main compartment:
Sleeping bag Snugpak Special Forces 2, new, in
Bivvy bag Snugpak Special Forces, new,
or British army, used in very good conditions
On top of it in the main compartment:
Ortlieb 7 litres dry bag PS10 as pillow too, new,
containing
Fleece jacket Solognac 300, new
Fleece jacket Solognac 100, new
Spare underwear 1X
Briefs and T-shirt, thin cotton
Woolen spare socks 1X Falke TK1 or British army, new
Swimming briefs 1X
(Shorts Solognac 100, new)
Longjohns, fleece, Solognac 100, new
Knitted cap, Solognac 300 Larch, new
Liner gloves Solognac 100, new
All leather working gloves, new
Left side pouch:
Poncho, German army, used
or British army shelter sheet, used
Cordage
2x 3 m to tension it as lean to shelter, and 1,5 m to make a tripod,
(1,5 m additional for belt attachments and loops for the poncho grommets.)
Edelrid multicord SP, 2,5 mm orange, new
Food
in the
Pathfinder Bush Pot 1800 ml
new, in a plastic bag.
Right side pouch:
Toilet paper in a toppits zipp lock freezer bag
Wash kit
Folding tooth brush, tooth cream, little tube, soap in a bottle, Sea to Summit body wash 89 ml, razor Wilkinson disposable orange, small towel, Nabaji size S, new.
It fits all together - razor blade protecting - into
Solognac Organizer Size S, new
Mug, Lixada 750 ml stainless steel with bail and butterfly handles, new, in a plastic bag
2x Bottle, Nalgene 1 litre cylindrical and clear, new, nests with the mug above
In the flap pocket:
Knife Morakniv Garberg stainless steel with leather sheath or Hultafors GK heavy duty, new
Spoon stainless steel from the flea market
Candle in a zipp lock freezer bag
As fire starter you can put a few drips of wax on the twigs.
Bic cigarette lighter, orange, new
(Gas stove Alpkit Kraku with cardridge Primus red, new)
Head lamp Petzl e+lite, new
Head net Sea to Summit Nano, new
Waterproof cap Solognac 500, new
Perhaps Goretex suit German army, used
ON THE MAN:
Mountain boots Schladminger 100, new
Woolen Socks Falke TK1 or British army, new
Underwear briefs thin cotton
Trousers Solognac Steppe 300, new
Belt Solognac 100
Cotton Handkerchief
Several times folded usable as pot holder and pre filter before water purification by boiling.
Purse
House keys
attached with 40 cm cord to the belt.
Bic cigarette lighter orange
Pocket Knife Victorinox Climber, new, attached with 60 cm cord to the belt.
T-shirt Solognac 100
Shirt Buttoned (army) long sleeved shirt with two pockets and flaps over it or Solognac hunting shirt 500
Compass Suunto M-9
Topographical hiking map 1:50 000
That's a complete packing list for several weeks or months long journeys.
More you don't need and you can start in summer conditions with much less of course.