1) It's a relatively straightforward situation if your wife and children already have British passports. Assuming your wife is over 21 years of age then you can enter the UK as her spouse. There are some requirements you will need to fulfil, such as intending on continuing the relationship and being able to support yourselves financially. These are detailed, along with other information, on the
UKBA website.
As you would be applying from outside the UK, before you travel here, you must obtain permission to enter the UK (known as 'entry clearance'). You can get this from the British diplomatic post in your country of residence and it will take the form of a visa or an entry clearance certificate.
If your application is successful then you are given leave to enter for two years. Assuming you are still together towards the end of these two years you can apply for Indefinite Leave to Remain (ILR). Once you have been granted ILR and have been in the UK for three years you can choose to apply for British citizenship.
The requirements are similar to the requirements for ILR.
You should be aware that your absences from the UK must be limited to 90 days a year during these qualifying periods.Note that you will have to take the
Life in the UK Test in order to get ILR/citizenship and meet the
new English language requirements for partners.
You will also have to pay a non-refundable fee to apply for ILR (and another one later if you naturalise as a British citizen) and provide certain documents as specified on the UK Border Agency website:
Form SET (M) and guidance notes.
Finally, there is also the following instruction on the
UK Visa website: "If you and your husband, wife or civil partner
have been living together outside the UK for four years or more, and you meet all the necessary requirements to stay permanently in the UK, you may be granted
indefinite leave to enter. These requirements include showing that you have the necessary level of knowledge of the English language and life in the UK (see relevant section of this guidance for more information)."
This would mean that you are granted ILR on entry, although there doesn't seem to be any information about how to get this on the site. I would recommend asking your local British diplomatic office about this.
2) Education is free and compulsory for children aged 5-16 in the UK. This means that will be eligible for education in the UK. When you know where you are going to be living in the UK you should contact the local education authority to make arrangements for their education.
I hope this helps
George
www.lifeintheuk.net