How much do you have to giveaway for each level upgrade?

You have to do all the giveaways to get to level 10.

http://www.steamgifts.com/discussion/XaCbA/list-of-all-cv-levels-and-their-corresponding-real-cv

You can also check your level upgrade progress here:
http://www.sgcv.tk/sent/PandazHub

At least 9000

Level 1 - 0.01
Level 2 - 25
Level 3 - 50
Level 4 - 100
Level 5 - 250
Level 6 - 500
Level 7 - 1000
Level 8 - 2000
Level 9 - 3000
Level 10 - 5000

Use this site to figure out real value of your giveaways after SGs bundle/5+ copies calculation.