Hi. I don't think you can buy access to the First Class lounge, from memory, you need to be a Platinum frequent flyer or flying in First Class. I would buy a hotel room and get 7 hours proper rest. I've stayed at the Holiday Inn at the Airport, it's just OK but not special but a clean bed is a clean bed when you want some sleep. The thieving buggers at the Holiday Inn reception double billed for the room meaning my company booked and paid for the room then the Holiday Inn also depicted my credit card for the room. The First Class lounge is just a lounge and not really suitable for sleep

No you would not be allowed access into the F lounge as your boarding card would be for the DEL sector. If you are silver skywards or above you could use J class lounge as part of your skywards. Platinum status gets you in F regardless of class of travel.

Nada

Dubai, obviously

Yes it is

Yes you can

there is so much to do, if u upgrade to business (worth it) , u can even have a free hotel room at the airport if the layover is some hours, perhaps the 10 hours will be enough...one can take showers and rest in quiet rooms on nice clean bed things with clean blankets also.. one can spend the 10 hours browsing the airport it is huge, samples to try, shops to shop in, places to eat, if u upgrade to business, the food is amazing, all food/booze is free...if u do not want to upgrade u can pay a little for cheaper lounges, not as good as the emirates, but one pays for what one gets, if u have an AMEX card they have priority plus lounges in many airports..good luck

I do not think so as I have never heard of it being done by Emirates, unlike BA at Heathrow.