How do i program a vizio tv to a toshiba ct-90233?

Probably needs the caps replaced in the power supply but I would get an engineer to tackle this job unless your confident at soldering.

Here is the link for the manual for your remote control.
http://remotes.com/remotes/documents/Toshiba/CT-90233.pdf

please go to the next web pages:

www.fitness.manualsonline.com or www. remotecodelist.com

God bless you

Hello
This remote control is for use with Toshiba 22AV500U TV. It is originally coded to use with this TV, yet other TVs also can be programmed with this remote contorl. There si no specific user manual for this remote control itself. All codes and proceedings are with the user manual for the above mentioned model Toshiba Tv. If you haven't that manual, send your email address to me by Fixya. I'll send a copy of that manual to you by return mail. Or go tho this link from where you can download the above said TVs manual for as PDF format. OK
a248.e.akamai.net/pix.crutchfield.com/Manuals/052/05222AV500.PDF

your remote is old and needs to be cleaned and rebuttoned(you can do this yourself) open up the battery panel and look for small screws to take of the case. you need to dust it out with compressed air. and reline the buttons. when you push down on the power button it probbaly is not making complete contact with the button, take a small thing and poke the power button without the buttons on. see if that works. if it turns on right away with direct pressure to the power switch then you just need to make sure your buttons are making complete contact. if that dont work then your circuit is screwed. you need a new remote or a new tv.

http://tablaguy.blogspot.com/2009/02/how-to-program-toshiba-tv-universal.html

http://remotes.com/remotes/documents/Toshiba/CT-877.pdf

how do I Adjust picture size?

Here is a link to your manual:

http://remotes.com/remotes/documents/Toshiba/CT-90233.pdf