1. See you can make an camera rental agreement and can ask your clients to sign same at time of renting and further also ask for deposit from them.
2. If it is online then you can have an online agreement which by accepting shall be deemed to be agreed upon.
3. See a draft need to be prepared with all condition you need to engage an advocate for same.
4. At time of delivery a handing over note and endorsement with model number that so and so camera is handed over to person along with his Id proof for such time period in good working condition.
5. Yes the cheque and Id proof are sufficient along with agreement.
6. Agreement without stamp paper can be prepared and signed.