And if I do it ....

If I get the HTC....Then Get the $7 bucks a month plan, then put skype, Then can I use my skype as a normal phone, also is thier a pay as you go for bell, and do you get a number by skype and bell?

Not sure if the Touch can go on prepaid, and even more unsure if they'd let you use Skype....

There is a Pay as you go from Bell but it won't apply to the $7 unlimited mobile browser feature.
And not to be a stickler, but in your interest I would not recommend using Syype as it's a VOIP feature which is prohibited by Bell's TOS, article 19.

19. Use of Service.

You are responsible to safeguard your Device, and for the use of your Device and the Services by you and any other persons, except as provided under Section 17 above. You shall not use or allow others to use the Service or your Device if such use:

is for multi-media streaming, voice over Internet protocol or any other application which uses excessive network capacity that is not made available to you by Bell;

Bell has been known for sending out notices to those who abuse the network, these letters have only been given to those who use PC cards, but this could also apply to the unlimited mobile browser feature as well.

I've heard of Touch users getting these letters as well...