Want to undo the Apple IOS 10 - Can't access home page with all my apps

What iPad do you have? If it's on the minimum required list of apple for iOS 10 you can simply use the system settings app to search for updates and get the updated iOS.
iOS 10 Wikipedia

Hi Deborah,
Hulu on the App Store

The link above will take you to the app in iTunes or App Store. If you receive an error stating you cannot download because you need to update, that may be your only option. By the model listed above I'm thinking your tablet is very new so you should have little trouble updating your iPad.

I will leave a link below describing how to update your iPad (link takes you to Apple Help).
Update the iOS software on your iPhone iPad and iPod touch

I hope this find you well,
Niall

If your iPad was properly jailbroken, Cydia is automatically installed on your device. If you do not see Cydia as one of the Apps, either it was never properly jailbroken or you accidentally deleted the app. In either case, go through the jailbreaking process again. Make sure your iOS version is supported by the jailbreak program.

Also, anytime you update your iOS version, you will lose your jailbreak. It's never a good idea to update iOS unless you know the new version is supported by the jailbreaking programs. Also, never update OTA (Over the Air) aka wirelessly. ALWAYS update your iOS by plugging your device into a computer and doing it through iTunes. Doing OTA updates sometimes has crippling effects.

Unfortunately you can only update to 5.1.1 for the ipad1

Unfortunately, you can't. Some application owners make provision for older operating systems, but Netflix is not one who does.

This article may help you. It is for iPhone, but the same operating system runs on iPad as well.

Several months ago I downloaded iOS 7 beta with developer program. It worked fine. When iOS 7 had officially came out, I checked my phone and it restarted on its own. The locked screen said"Activation Error: This device is not registered as part of the iPhone Developer Program. If you are a member of the iPhone Developer Program, please register your device in the iPhone Developer Program Portal at http://developer.apple.com/iphone." I went to the link using my computer, although I am not a developer, and it didn't help me.
Recent days we see lots of iPhone users reported iOS 7 activation error. How did this happened? It is probably because users installed iOS 7 beta 6. As the iOS 7 beta has expired on October 6, which means anyone still running one won't be able to use their iPhone, iPod touch, or iPad, and won't even be able to get past Activation if they try.
If you're experiencing an iOS 7 activation error on your iPhone/other device and were previously using iOS7 beta, there's a good chance to fix it with following simple steps:
1) make sure you have upgraded to iTunes 11.1.1. It is the most recent version of iTunes.
2) Plug you iPhone/iDevice into your computer. Back up the data on the device.
3) Click "Restore" on your device's page in iTunes. If this doesn't work, proceed to DFU mode
4) your device is done restoring and activating you can restore your data from your iTunes backup
5) you can use your non-beta iOS 7
If iTunes says there is no newer version to upgrade to, you can put your iPhone or device to DFU mode after the backup. DFU (Device Firmware Update) mode will make sure you download and install the latest release version of iOS off of Apple's servers.
1) Plug your iPhone, iPod touch, or iPad into your Mac or Windows PC and make sure iTunes is running.
2) Hold down both the Sleep Button (on top of your device) and the Home Button (on the front underneath the screen).
3) Keep them both held down from about 10 seconds. (If you see the Apple logo, you've held them too long and will need to start again.)
4) Let go of the Sleep Button but keep holding the Home Button for about 5 seconds. (If you see the "Plus into iTunes" screen than you held it too long and will need to start again.)
5) Restore the device

there are some core apps belonging to the iOS system and cannot be deleted like 'clock', 'calendar', 'contacts', 'facebook' etc.
--------------------------------------------------
core apps:
1) Airdrop
2) Apple Store
3) calendar
4) camera
5) clock
6) contacts
7) facebook
8) game center
9) iBooks
10) iTunes
11) mail
12) maps
13) messages
14) music
15) newsstand
16) notes
17) photo booth
18) photos
19) reminders
20) safari
21) settings
22) siri
23) tips
24) touch ID
25) videos

NO
- iOS 6 and higher is not compatible with first gen. iPads!
First gen iPad not getting iOS 6 update Apple confirms

You will not be able to install if the app requires a certain version of the operating system. I would also suggest updating your device to the latest version of iOS 7 which is 7.0.3 which would also allow you to install the app.

You can learn more about iOS 7 at http://www.apple.com/ios/

Hope that helps!