Paper / cardstock:
I recommend 180gsm / 65lb white, matte cardstock. Check if your printer can actually process this kind of paper, but most should do fine. For the US, I recommend Array Card Stock. For Germany, I recommend this cardstock.
For other countries, look for A4 or US letter 170-190gsm or about 65lb white carstock, which is suitable for printing with an inkjet or laser printer.
Scissors / knives:
You should have both scissors and a crafting knife. Scissors are for round / irregular shapes, and knives are for straight lines and holes. For the US, these Scotch scissors and an X-acto knife can be recommended.
Glue:
Don't use sticks - they are difficult to apply to tiny pieces. Instead, use liquid glue. About any kind works, but it should be not too runny. There are glues which are white initially but transparent when set - very useful for seeing where you have already applied glue. Don't use too much glue - try applying it with a toothpick. For the US, I'd recommend Elmer's glue, for Europe Pritt Bastelkleber
Printer:
I recommend an inkjet printer over a laser printer. With laser printers, the toner forms a layer on top of the paper, which cracks when folded. With inkjets, the color seeps into the page and looks better over folds.
Almost any printer will do, but ideally use one which can handle heavy (180g) paper. If possible, use a straight paper path (some printers can be fed from the back or a special manual feed, so that the paper is not bent when going through the printer).
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