Yeah. You just need to set up the mail accounts on the iPad and have the iPad connected to the wifi.
It depends on the type of data, but email is generally the easiest way.
No. The YouTube app comes with the iPad standard.
You cannot delete apps without losing the associated data. The app space and the data are essentially one.
You can email yourself the MP3 file.
by sending it by email
Email it to the iPad's email account.
It can be. The iPad can connect with virtually all types of email servers to allow you to send and receive.
Many apps have copy/paste functions on the iPad. You cannot paste photos, music or other data files into an email message, since the Mail app does not have access to those apps' data. To send a photo, go to Photos, click the photo and use Send via Email.
There are about 3 or 4 places that offer IPad data plans. You could check your local AT&T or Verizon's service and request the iPad data plan for your iPad.
yes
M1 in Singapore has data plan specials from time to time.
The easiest way is to email it to the iPad.