Mysql can't be started (start job failed to start error)

Hi i can’t mysql server. I use Ubuntu 14.04 2 gb droplet

I try:

service mysql start

i get error

start job failed to start

i try this command

this command output:

http://pastebin.com/CC6WMRFc

I see: Unknown/unsupported storage engine: InnoDB

But, WordPress used to InnoDB. How to use InnoDB ?

How to solved? :(

Thank you also sorry for my bad english

Update://

I use this command

dmesg | grep mysql

output this command:

http://pastebin.com/6eTrPbC0

Update 2 ://

I try this command:

mysqladmin status

Output:

mysqladmin: connect to server at 'localhost' failed
error: 'Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)'
Check that mysqld is running and that the socket: '/var/run/mysqld/mysqld.sock' exists!