In traditional Jain homes, the oldest and most sacred style of making a small jinālaya / derāsar at home focuses on simplicity, cleanliness, non-violence, and purity.

Common traditional elements include:

• Cow-dung flooring in the very old rural style, especially in earlier times
• Wooden temple / wooden shrine
• Whitewashed or lime-plastered walls
• Clean raised platform for the idol or scripture
• Separate, quiet, pure corner of the house
• No leather, no violence-related items, no food or dust near the shrine
• Copper, brass, or wooden items for पूजा materials
• Small bell, lamp, and aasan for worship
• Simple cloth decoration, often white
• Fresh water vessel kept clean and separate
• Swetambar tradition may include more पूजा articles; Digambar tradition keeps the shrine simpler

Other old traditional features sometimes used:

• Tulsi? No, not as a Jain necessity
• Natural materials like clay, stone, wood, lime, and cotton
• Earthen oil lamp
• Handmade wooden or stone deity seat
• A small threshold or partition to preserve sanctity
• No synthetic colors or plastic items in the sacred area

If you want the most authentic old Jain home-temple style, the essentials are:

1. Clean pure space
2. Wood/stone/natural materials
3. Very simple decoration
4. Daily devotion with ahimsa and discipline

If you want, I can also give you a traditional Jain home temple layout in simple steps.