How do I set up an email account - ZEEPAD Brand 7inch 4gb Android 2.3 Tablet Pc, Inbuilt Wifi, Camera,

If you have set up your email account as an IMAP account, your emails are on the server, but if you delete them on your iPad, they are also delete on the server.
if you have set up your email account as a POP3 account, your emails are downloaded to your iPad ... if you delete them on your iPad, they are still on the server, so you can retrieve them. However, POP3 accounts don't show you the email folders that are on the server. You need to decide which is more important to you. On the iPad, do you want privacy (POP3) or flexibility (IMAP).
A POP3 account will also continue to use up more space (memory) and not clean-up (clear) ... eventually, you will have to delete the account to try to minimize the amount of used space. I don't know why it does this, but I have been fighting this problem for 4 years on two different versions of the iPhone. My iPhone is setup as POP3, while my iPad is set up as IMAP. I have not found a good answer to this problem.

Go to Google and get a G mail account they will help you do it.

You can access email on the iPad in 2 ways.
1) go to Settings / Mail etc....
and add an account and use the ISP's settings and your email details to be able to attach to your email account via POP or IMAP.

2) you can use Safari to navigate to your online mail account eg Hotmail by searching for Hotmail and entering your account and password details.

It sounds like you have no email account set up. Go to Settings / Mail etc and ensure that there is an account setup. If no, add an account and enter the details.

reset all settings & enjoy

1. Tap Settings
2. Go down to Mail, Contacts, Calender
3. Tap add account
4. Select your email provider. If you don't see your email provider listed, tap Other > Add Mail Account.
5. Provide the required information to finish adding your account.
If you use a common email provider, your device will load your email settings automatically.

On any iOS device you can receive mails, if you did setup the account correct. If anything has changed in the account, like from POP to SMTP or if something changed in the account name, or you changed the password, you have to change the settings to.
I think the easiest way is to go to settings, email and change the part BT changed. (what you call format, could be from POP to SMTP)
Or if you have everything about the settings on paper, just delete the BT account and set up a new BT account with the new settings.

It must be set in your account to do that, ask for your name and password. You need to go into your account you have with your tablet when you first set up the email address and change the settings. You may have not known that you checked the request for the name and password before entering. This can be easily changed. Just go into your email settings and look for the request to type in name and password and uncheck it.

You don't have to delete his account. It is simply the "default." If you setup your own mail account, you can then make your account the default. You will afterwards set up your own Skype account using your own email address. Nothing stops you from setting up a Gmail (Google) account. If you don't know how, simply google "how to set up a google email account." As to how to make that the default account on your iPad, where the menu item is to do that may depend upon the version of the operating system. Here is one depicted instruction set:

How do change my default Mail account on iOS 10 or you might find the following of use:

How to Set up Email on an iPad