In reply to Dashdash11:
+1 for Decathlon own-brand (Quechua) for good budget gear. Base layer, midlayer & outer shell, plus extra warm layer for rest stops. Hat, gloves & spares. Stainless steel flask, emergency/survival bag, map, compass, headtorch & you're ready to go.
For year-round mountain walking I would suggest a decent B2 rated boot (will be compatible with with C1 or C2 crampons for snowy/icy adventures) such as Scarpa Mantas or equivalent.
Try an assortment of boots (eg Scarpa, La Sportiva, Saloman, Raichle, Zamberlain....etc) & check out items for sale second hand on forums.
Have fun.