Dear webmaster, I have many account Blogger, and in each account, I registed 100 blog. I write automatic program can post automatic to these blog using Blogger API. So, Can i use only one ip for login to each Blogger in these account and post to theme. And one login, can i post multi blog. Can i use one account google adsense to these blog (many account blogger) with insert javascript only
Since you say 1 log in for many blogs, that is possible, just don't abuse it or Google will flag your account. Unless you break Adsense rule, you can use 1 adsense account for any number of sites/blogs you have.
if you will access all of your blogs from one ip then it would be problematic for you, i suggest you to use different ip to login in different account, yes you can use same google adsense id for all of your logs.