But if you want to know, yes, it's possible for companies to have extremely expensive stock.
Regarding dividends, the company first needs to actually offer them (most do not), so you need to look into the company itself. If the company does offer dividends, you just need to buy in any time prior to the ex-dividend date (but not on it).
The dividend will then be paid out to you on the payout date, as specified by the company. This is usually anywhere from a week to a month later (the latter more common). You do not need to own any stock after the ex-dividend date is reached (you can even sell the position on the ex-dividend date, if you'd like).
The company either pays the dividend to you as shares of the company, or as cash. You should check your account history on the payout date to make sure it's received.
When I type in British gas share price I get 1,273.000
Does that me one share is worth