First, you should know that how to use "got" and its other forms (get, gotten) especially in expressions, is one of the most difficult things for a non native to learn. So if you have trouble, don't feel bad. As far as got and have together, what you can use depends on US vs UK usage and word order. I'll write just about the US. These are fine and mean the same I have a brother. I have got a brother. I've got a brother I got a brother. Informal, but common when speaking. Do you have a brother? Have you got a brother? Got a brother? Very informal. Never in writing These we don't use. Have you a brother? Got you a brother? Do you got a brother? I hope this helps a little.

As I know we use " I have got" in BritainEnglish and "have" in American EN. I wish I could help you)

Both ways are fine, but "to have got" seems to be too formal for me. But be careful when you ask a question don't say "have you a car" just have you got a car or do you have a car.... if to explain it theoretically then the construction to have got something or smb... is the present perfect tence... but both are interchangeable

First, remember that we don't normally say 'I have got ...' .The usual form is with the contraction ''ve' : 'I've got a brother'. When you are talking about something that is yours (your family members, your job, your possessions and so on) you can say either: I have a brother. (correct, neutral and formal) I don't have a brother. Do you have a brother? or I've got a brother. (correct, neutral and informal) I haven't got a brother. Have you got a brother. Both are correct, and both have exactly the same meaning. As Ed pointed out, you may also hear this form: I got a brother (incorrect, very informal) but we wouldn't recommend that you use it. In fact, British and American English use these forms in more or less the same way. The only difference is in the attitude towards the forms. Americans use 'I've got' but will tell you that it's wrong and that you shouldn't learn this form. British people use 'I've got' and will happily teach it to their students. My advice is that it's fine and natural to use 'I've got' in all situations apart from in formal written contexts, where 'I have' is more appropriate.