[TYPO3-english] Installing TYPO3 CMS 7.6.12

[vincenzo zeuli]

dear all, I'm a newcomer, and I'm trying to install it on hosting: "lnx.negaweb.it/"
In synthesis I have 4 errors/warnings:
1) Some PHP functions disabled   --  disable_functions=system popen dl passthru proc_open shell_exec.
2) PHP extension zip not loaded --  TYPO3 CMS uses PHP extension zip but it is not loaded in your environment
3) Low PHP script execution time  --  max_execution_time=120
4) PHP max_input_vars very low  --  max_input_vars=1000
I have these four mistakes, and I want to know if they are REQUIRED to be solved and if competes everything to my ISP.
May I continue the installation with this errors?

king regards
Vincenzo