But the connotations are all different.
3. is wrong grammatically. Your sentence is about a habitual action. "Will" doesn't really work.
4. is not very natural.
2. is probably the most natural way of saying it. You arrive early, so you are able (can) have a cup of tea.
You really need to approach all of these verbs separately and learn their meanings. It's a significantly complicated task, and not one we can do for you in a forum like this. Besides, there are good grammar books that can explain those auxiliary and modal verbs.
If you have a specific question, we'd be happy to answer it.