Advice for outputting for tv?

I'm hoping to create some spots for tv but I'm unsure how I would go about getting my final footage into the hands of the tv station?

AFAIK the TV station requires footage to be on digibeta tapes. If this is the case how would I get my ae footage on to the tape in the best quality possible?

I'm guessing I would need to get my footage transfered to digibeta via a third party who has the necessary equipment to do this. But what I'm unsure about is the process of copying my footage from one to the other?

Another question I'm unsure of is are the any guidelines for when you submit such things to a tv station? Such as should the spot have a counter/countdown (sorry I don't know the technical term!) graphic placed at its beginning?

Sorry if this all sounds very dumb but if someone could give me any advice in this area it would be much appreciated. I'd rather find out from you guys here then look even dumber asking someone who thinks I should know this already!

Alternatively if someone could point me in the direction of a website that could help me out that would be great too.