shinkansen from osaka-kyoto-tokyo

i plan to travel from Osaka-kyoto-tokyo by Shinkansen {one way only).is it cost effective for me to buy JR PASS ?or should I buy Shinkansen one by one? how much it cost?
Should I wait till I arrive at Osaka to buy the ticket or should I reserve a ticket before I go to Japan?
is it easy to buy the ticket?
please advise me

is it cost effective for me to buy JR PASS ?

No, regular tickets are much cheaper!

or should I buy Shinkansen one by one? how much it cost?

Osaka-Kyoto:
http://www.japan-guide.com/e/e4006.html?aFROM=2157_2158

Kyoto-Tokyo:
http://www.japan-guide.com/e/e2363.html

http://www.hyperdia.com/

Should I wait till I arrive at Osaka to buy the ticket or should I reserve a ticket before I go to Japan?

You can't reserve tickets from outside of Japan.

is it easy to buy the ticket?

Yes. Basics:
http://www.japan-guide.com/e/e2018.html

thank you for your help
Do you know where can I buy the ticket?
is it at Kaisai airport or at shin-osaka JR station?

hi again
do you think the JR special rapid train can take the suitcase?

No problem except regular weekday morning or evening rush peak.

JR Special rapid using same commuter cars just faster skip stns a lot
than regular rapid(different skip stn numbers) and local(all stn stop).
No seat numbers No seat booking.
http://livedoor.blogimg.jp/localforfuchu/imgs/6/6/6634fc32.jpg

You can buy the ticket at any train station that has a ticket counter booth.

These are usually most stations in major cities, airports, and major stations in smaller cities. Towns/villages/rural residential areas might not have a ticket counter. They might not even have a station!

In case I wasn't clear...
Osaka is a major city
Shin-Osaka station is a major station

Ticket ok

Kansai Airport is an international airport.

Ticket ok

Thanks so much everyone for helping me.
I have a lot of idea now