My ipad doesn’t start

Having dropped your iPad, it has likely suffered internal damage that may require repair.

You would be best advised to visit the Genius Bar at your local Apple Store or Apple Authorised Service Provider (AASP) where the technicians will be able to test and assess your iPad - and you will be able to explore your available options.

Genius Bar Reservation and Apple Support Options - Apple

Alternatively, you might choose to use Apple's mail-in repair service:

iPad Repair & Service - Apple Support

For practical purposes, in lieu of repairing and returning your own iPad, Apple usually exchange the iPad for a renewed/refurbished iPad of the same model and specification. The cost of the exchange is the same as would otherwise be charged for repair. Unless you have benefit of an active AppleCare plan, an out-of-warranty repair while expensive will be somewhat less than the cost of a replacement iPad.

As for out-of-warranty repair costs, Apple offers a fixed-price price repair. You can verify eligibility and cost for your region/country using the link already provided.

If you have an active AppleCare+ plan, the cost of repair is reduced to a small excess/deductible fee.